<informationTable xmlns="http://www.sec.gov/edgar/document/thirteenf/informationtable" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
   <infoTable>
       <nameOfIssuer>AT&amp;T INC</nameOfIssuer>
       <titleOfClass>COMMON STOCK</titleOfClass>
       <cusip>00206R102</cusip>
       <value>489</value>
       <shrsOrPrnAmt>
           <sshPrnamt>11771</sshPrnamt>
           <sshPrnamtType>SH</sshPrnamtType>
       </shrsOrPrnAmt>
       <investmentDiscretion>SOLE</investmentDiscretion>
       <votingAuthority>
           <Sole>11771</Sole>
           <Shared>0</Shared>
           <None>0</None>
       </votingAuthority>
   </infoTable>
   <infoTable>
       <nameOfIssuer>ALLSTATE CORP</nameOfIssuer>
       <titleOfClass>COMMON STOCK</titleOfClass>
       <cusip>020002101</cusip>
       <value>318</value>
       <shrsOrPrnAmt>
           <sshPrnamt>3897</sshPrnamt>
           <sshPrnamtType>SH</sshPrnamtType>
       </shrsOrPrnAmt>
       <investmentDiscretion>SOLE</investmentDiscretion>
       <votingAuthority>
           <Sole>3897</Sole>
           <Shared>0</Shared>
           <None>0</None>
       </votingAuthority>
   </infoTable>
   <infoTable>
       <nameOfIssuer>CIMAREX ENERGY CO</nameOfIssuer>
       <titleOfClass>COMMON STOCK</titleOfClass>
       <cusip>171798101</cusip>
       <value>257</value>
       <shrsOrPrnAmt>
           <sshPrnamt>2152</sshPrnamt>
           <sshPrnamtType>SH</sshPrnamtType>
       </shrsOrPrnAmt>
       <investmentDiscretion>SOLE</investmentDiscretion>
       <votingAuthority>
           <Sole>2152</Sole>
           <Shared>0</Shared>
           <None>0</None>
       </votingAuthority>
   </infoTable>
   <infoTable>
       <nameOfIssuer>CISCO SYSTEMS INC</nameOfIssuer>
       <titleOfClass>COMMON STOCK</titleOfClass>
       <cusip>17275R102</cusip>
       <value>338</value>
       <shrsOrPrnAmt>
           <sshPrnamt>10010</sshPrnamt>
           <sshPrnamtType>SH</sshPrnamtType>
       </shrsOrPrnAmt>
       <investmentDiscretion>SOLE</investmentDiscretion>
       <votingAuthority>
           <Sole>10010</Sole>
           <Shared>0</Shared>
           <None>0</None>
       </votingAuthority>
   </infoTable>
   <infoTable>
       <nameOfIssuer>CONCHO RESOURCES</nameOfIssuer>
       <titleOfClass>COMMON STOCK</titleOfClass>
       <cusip>20605P101</cusip>
       <value>498</value>
       <shrsOrPrnAmt>
           <sshPrnamt>3881</sshPrnamt>
           <sshPrnamtType>SH</sshPrnamtType>
       </shrsOrPrnAmt>
       <investmentDiscretion>SOLE</investmentDiscretion>
       <votingAuthority>
           <Sole>3881</Sole>
           <Shared>0</Shared>
           <None>0</None>
       </votingAuthority>
   </infoTable>
   <infoTable>
       <nameOfIssuer>CONTINENTAL RESOURCES</nameOfIssuer>
       <titleOfClass>COMMON STOCK</titleOfClass>
       <cusip>212015101</cusip>
       <value>487</value>
       <shrsOrPrnAmt>
           <sshPrnamt>10718</sshPrnamt>
           <sshPrnamtType>SH</sshPrnamtType>
       </shrsOrPrnAmt>
       <investmentDiscretion>SOLE</investmentDiscretion>
       <votingAuthority>
           <Sole>10718</Sole>
           <Shared>0</Shared>
           <None>0</None>
       </votingAuthority>
   </infoTable>
   <infoTable>
       <nameOfIssuer>DIAMONDBACK ENERGY INC</nameOfIssuer>
       <titleOfClass>COMMON STOCK</titleOfClass>
       <cusip>25278X109</cusip>
       <value>446</value>
       <shrsOrPrnAmt>
           <sshPrnamt>4301</sshPrnamt>
           <sshPrnamtType>SH</sshPrnamtType>
       </shrsOrPrnAmt>
       <investmentDiscretion>SOLE</investmentDiscretion>
       <votingAuthority>
           <Sole>4301</Sole>
           <Shared>0</Shared>
           <None>0</None>
       </votingAuthority>
   </infoTable>
   <infoTable>
       <nameOfIssuer>EOG RESOURCES INC</nameOfIssuer>
       <titleOfClass>COMMON STOCK</titleOfClass>
       <cusip>26875P101</cusip>
       <value>394</value>
       <shrsOrPrnAmt>
           <sshPrnamt>4040</sshPrnamt>
           <sshPrnamtType>SH</sshPrnamtType>
       </shrsOrPrnAmt>
       <investmentDiscretion>SOLE</investmentDiscretion>
       <votingAuthority>
           <Sole>4040</Sole>
           <Shared>0</Shared>
           <None>0</None>
       </votingAuthority>
   </infoTable>
   <infoTable>
       <nameOfIssuer>GENERAL ELECTRIC</nameOfIssuer>
       <titleOfClass>COMMON STOCK</titleOfClass>
       <cusip>369604103</cusip>
       <value>300</value>
       <shrsOrPrnAmt>
           <sshPrnamt>10051</sshPrnamt>
           <sshPrnamtType>SH</sshPrnamtType>
       </shrsOrPrnAmt>
       <investmentDiscretion>SOLE</investmentDiscretion>
       <votingAuthority>
           <Sole>10051</Sole>
           <Shared>0</Shared>
           <None>0</None>
       </votingAuthority>
   </infoTable>
   <infoTable>
       <nameOfIssuer>GENESIS ENERGY</nameOfIssuer>
       <titleOfClass>COMMON STOCK</titleOfClass>
       <cusip>371927104</cusip>
       <value>9726</value>
       <shrsOrPrnAmt>
           <sshPrnamt>300000</sshPrnamt>
           <sshPrnamtType>SH</sshPrnamtType>
       </shrsOrPrnAmt>
       <investmentDiscretion>SOLE</investmentDiscretion>
       <votingAuthority>
           <Sole>300000</Sole>
           <Shared>0</Shared>
           <None>0</None>
       </votingAuthority>
   </infoTable>
   <infoTable>
       <nameOfIssuer>ISHARES</nameOfIssuer>
       <titleOfClass>ETF / CLOSED EN</titleOfClass>
       <cusip>464287226</cusip>
       <value>2998</value>
       <shrsOrPrnAmt>
           <sshPrnamt>27630</sshPrnamt>
           <sshPrnamtType>SH</sshPrnamtType>
       </shrsOrPrnAmt>
       <investmentDiscretion>SOLE</investmentDiscretion>
       <votingAuthority>
           <Sole>27630</Sole>
           <Shared>0</Shared>
           <None>0</None>
       </votingAuthority>
   </infoTable>
   <infoTable>
       <nameOfIssuer>ISHARES</nameOfIssuer>
       <titleOfClass>ETF / CLOSED EN</titleOfClass>
       <cusip>464287226</cusip>
       <value>134</value>
       <shrsOrPrnAmt>
           <sshPrnamt>1238</sshPrnamt>
           <sshPrnamtType>SH</sshPrnamtType>
       </shrsOrPrnAmt>
       <investmentDiscretion>OTR</investmentDiscretion>
       <votingAuthority>
           <Sole>1238</Sole>
           <Shared>0</Shared>
           <None>0</None>
       </votingAuthority>
   </infoTable>
   <infoTable>
       <nameOfIssuer>ISHARES</nameOfIssuer>
       <titleOfClass>ETF / CLOSED EN</titleOfClass>
       <cusip>464287465</cusip>
       <value>3245</value>
       <shrsOrPrnAmt>
           <sshPrnamt>52087</sshPrnamt>
           <sshPrnamtType>SH</sshPrnamtType>
       </shrsOrPrnAmt>
       <investmentDiscretion>SOLE</investmentDiscretion>
       <votingAuthority>
           <Sole>52087</Sole>
           <Shared>0</Shared>
           <None>0</None>
       </votingAuthority>
   </infoTable>
   <infoTable>
       <nameOfIssuer>ISHARES</nameOfIssuer>
       <titleOfClass>ETF / CLOSED EN</titleOfClass>
       <cusip>464287465</cusip>
       <value>248</value>
       <shrsOrPrnAmt>
           <sshPrnamt>3978</sshPrnamt>
           <sshPrnamtType>SH</sshPrnamtType>
       </shrsOrPrnAmt>
       <investmentDiscretion>OTR</investmentDiscretion>
       <votingAuthority>
           <Sole>3978</Sole>
           <Shared>0</Shared>
           <None>0</None>
       </votingAuthority>
   </infoTable>
   <infoTable>
       <nameOfIssuer>ISHARES</nameOfIssuer>
       <titleOfClass>ETF / CLOSED EN</titleOfClass>
       <cusip>464287630</cusip>
       <value>2625</value>
       <shrsOrPrnAmt>
           <sshPrnamt>22212</sshPrnamt>
           <sshPrnamtType>SH</sshPrnamtType>
       </shrsOrPrnAmt>
       <investmentDiscretion>SOLE</investmentDiscretion>
       <votingAuthority>
           <Sole>22212</Sole>
           <Shared>0</Shared>
           <None>0</None>
       </votingAuthority>
   </infoTable>
   <infoTable>
       <nameOfIssuer>ISHARES</nameOfIssuer>
       <titleOfClass>ETF / CLOSED EN</titleOfClass>
       <cusip>464287630</cusip>
       <value>289</value>
       <shrsOrPrnAmt>
           <sshPrnamt>2449</sshPrnamt>
           <sshPrnamtType>SH</sshPrnamtType>
       </shrsOrPrnAmt>
       <investmentDiscretion>OTR</investmentDiscretion>
       <votingAuthority>
           <Sole>2449</Sole>
           <Shared>0</Shared>
           <None>0</None>
       </votingAuthority>
   </infoTable>
   <infoTable>
       <nameOfIssuer>KIMBERLY CLARK CORP</nameOfIssuer>
       <titleOfClass>COMMON STOCK</titleOfClass>
       <cusip>494368103</cusip>
       <value>377</value>
       <shrsOrPrnAmt>
           <sshPrnamt>2862</sshPrnamt>
           <sshPrnamtType>SH</sshPrnamtType>
       </shrsOrPrnAmt>
       <investmentDiscretion>SOLE</investmentDiscretion>
       <votingAuthority>
           <Sole>2862</Sole>
           <Shared>0</Shared>
           <None>0</None>
       </votingAuthority>
   </infoTable>
   <infoTable>
       <nameOfIssuer>OCCIDENTAL PETROLEUM</nameOfIssuer>
       <titleOfClass>COMMON STOCK</titleOfClass>
       <cusip>674599105</cusip>
       <value>321</value>
       <shrsOrPrnAmt>
           <sshPrnamt>5070</sshPrnamt>
           <sshPrnamtType>SH</sshPrnamtType>
       </shrsOrPrnAmt>
       <investmentDiscretion>SOLE</investmentDiscretion>
       <votingAuthority>
           <Sole>5070</Sole>
           <Shared>0</Shared>
           <None>0</None>
       </votingAuthority>
   </infoTable>
   <infoTable>
       <nameOfIssuer>PARSLEY ENERGY INCORPORATED</nameOfIssuer>
       <titleOfClass>COMMON STOCK</titleOfClass>
       <cusip>701877102</cusip>
       <value>256</value>
       <shrsOrPrnAmt>
           <sshPrnamt>7877</sshPrnamt>
           <sshPrnamtType>SH</sshPrnamtType>
       </shrsOrPrnAmt>
       <investmentDiscretion>SOLE</investmentDiscretion>
       <votingAuthority>
           <Sole>7877</Sole>
           <Shared>0</Shared>
           <None>0</None>
       </votingAuthority>
   </infoTable>
   <infoTable>
       <nameOfIssuer>PIONEER NATURAL RESOURCES</nameOfIssuer>
       <titleOfClass>COMMON STOCK</titleOfClass>
       <cusip>723787107</cusip>
       <value>545</value>
       <shrsOrPrnAmt>
           <sshPrnamt>2926</sshPrnamt>
           <sshPrnamtType>SH</sshPrnamtType>
       </shrsOrPrnAmt>
       <investmentDiscretion>SOLE</investmentDiscretion>
       <votingAuthority>
           <Sole>2926</Sole>
           <Shared>0</Shared>
           <None>0</None>
       </votingAuthority>
   </infoTable>
   <infoTable>
       <nameOfIssuer>POWERSHARES</nameOfIssuer>
       <titleOfClass>ETF / CLOSED EN</titleOfClass>
       <cusip>73935X583</cusip>
       <value>4983</value>
       <shrsOrPrnAmt>
           <sshPrnamt>48626</sshPrnamt>
           <sshPrnamtType>SH</sshPrnamtType>
       </shrsOrPrnAmt>
       <investmentDiscretion>SOLE</investmentDiscretion>
       <votingAuthority>
           <Sole>48626</Sole>
           <Shared>0</Shared>
           <None>0</None>
       </votingAuthority>
   </infoTable>
   <infoTable>
       <nameOfIssuer>POWERSHARES</nameOfIssuer>
       <titleOfClass>ETF / CLOSED EN</titleOfClass>
       <cusip>73935X583</cusip>
       <value>652</value>
       <shrsOrPrnAmt>
           <sshPrnamt>6359</sshPrnamt>
           <sshPrnamtType>SH</sshPrnamtType>
       </shrsOrPrnAmt>
       <investmentDiscretion>OTR</investmentDiscretion>
       <votingAuthority>
           <Sole>6359</Sole>
           <Shared>0</Shared>
           <None>0</None>
       </votingAuthority>
   </infoTable>
   <infoTable>
       <nameOfIssuer>POWERSHARES</nameOfIssuer>
       <titleOfClass>ETF / CLOSED EN</titleOfClass>
       <cusip>73936Q769</cusip>
       <value>338</value>
       <shrsOrPrnAmt>
           <sshPrnamt>14550</sshPrnamt>
           <sshPrnamtType>SH</sshPrnamtType>
       </shrsOrPrnAmt>
       <investmentDiscretion>SOLE</investmentDiscretion>
       <votingAuthority>
           <Sole>14550</Sole>
           <Shared>0</Shared>
           <None>0</None>
       </votingAuthority>
   </infoTable>
   <infoTable>
       <nameOfIssuer>RSP PERMIAN INC</nameOfIssuer>
       <titleOfClass>COMMON STOCK</titleOfClass>
       <cusip>74978Q105</cusip>
       <value>473</value>
       <shrsOrPrnAmt>
           <sshPrnamt>11415</sshPrnamt>
           <sshPrnamtType>SH</sshPrnamtType>
       </shrsOrPrnAmt>
       <investmentDiscretion>SOLE</investmentDiscretion>
       <votingAuthority>
           <Sole>11415</Sole>
           <Shared>0</Shared>
           <None>0</None>
       </votingAuthority>
   </infoTable>
   <infoTable>
       <nameOfIssuer>RICE ENERGY INCORPORATED</nameOfIssuer>
       <titleOfClass>COMMON STOCK</titleOfClass>
       <cusip>762760106</cusip>
       <value>234</value>
       <shrsOrPrnAmt>
           <sshPrnamt>9863</sshPrnamt>
           <sshPrnamtType>SH</sshPrnamtType>
       </shrsOrPrnAmt>
       <investmentDiscretion>SOLE</investmentDiscretion>
       <votingAuthority>
           <Sole>9863</Sole>
           <Shared>0</Shared>
           <None>0</None>
       </votingAuthority>
   </infoTable>
   <infoTable>
       <nameOfIssuer>SPDR</nameOfIssuer>
       <titleOfClass>ETF / CLOSED EN</titleOfClass>
       <cusip>78462F103</cusip>
       <value>611</value>
       <shrsOrPrnAmt>
           <sshPrnamt>2592</sshPrnamt>
           <sshPrnamtType>SH</sshPrnamtType>
       </shrsOrPrnAmt>
       <investmentDiscretion>SOLE</investmentDiscretion>
       <votingAuthority>
           <Sole>2592</Sole>
           <Shared>0</Shared>
           <None>0</None>
       </votingAuthority>
   </infoTable>
   <infoTable>
       <nameOfIssuer>SABRA</nameOfIssuer>
       <titleOfClass>COMMON STOCK</titleOfClass>
       <cusip>78573L106</cusip>
       <value>494</value>
       <shrsOrPrnAmt>
           <sshPrnamt>17694</sshPrnamt>
           <sshPrnamtType>SH</sshPrnamtType>
       </shrsOrPrnAmt>
       <investmentDiscretion>SOLE</investmentDiscretion>
       <votingAuthority>
           <Sole>17694</Sole>
           <Shared>0</Shared>
           <None>0</None>
       </votingAuthority>
   </infoTable>
   <infoTable>
       <nameOfIssuer>VANGUARD ADMIRAL FUNDS INC</nameOfIssuer>
       <titleOfClass>ETF / CLOSED EN</titleOfClass>
       <cusip>921932885</cusip>
       <value>3747</value>
       <shrsOrPrnAmt>
           <sshPrnamt>32390</sshPrnamt>
           <sshPrnamtType>SH</sshPrnamtType>
       </shrsOrPrnAmt>
       <investmentDiscretion>SOLE</investmentDiscretion>
       <votingAuthority>
           <Sole>32390</Sole>
           <Shared>0</Shared>
           <None>0</None>
       </votingAuthority>
   </infoTable>
   <infoTable>
       <nameOfIssuer>VANGUARD ADMIRAL FUNDS INC</nameOfIssuer>
       <titleOfClass>ETF / CLOSED EN</titleOfClass>
       <cusip>921932885</cusip>
       <value>401</value>
       <shrsOrPrnAmt>
           <sshPrnamt>3464</sshPrnamt>
           <sshPrnamtType>SH</sshPrnamtType>
       </shrsOrPrnAmt>
       <investmentDiscretion>OTR</investmentDiscretion>
       <votingAuthority>
           <Sole>3464</Sole>
           <Shared>0</Shared>
           <None>0</None>
       </votingAuthority>
   </infoTable>
   <infoTable>
       <nameOfIssuer>WAL-MART STORES INC</nameOfIssuer>
       <titleOfClass>COMMON STOCK</titleOfClass>
       <cusip>931142103</cusip>
       <value>250</value>
       <shrsOrPrnAmt>
           <sshPrnamt>3473</sshPrnamt>
           <sshPrnamtType>SH</sshPrnamtType>
       </shrsOrPrnAmt>
       <investmentDiscretion>SOLE</investmentDiscretion>
       <votingAuthority>
           <Sole>3473</Sole>
           <Shared>0</Shared>
           <None>0</None>
       </votingAuthority>
   </infoTable>
   <infoTable>
       <nameOfIssuer>WELLS FARGO &amp; CO</nameOfIssuer>
       <titleOfClass>COMMON STOCK</titleOfClass>
       <cusip>949746101</cusip>
       <value>482</value>
       <shrsOrPrnAmt>
           <sshPrnamt>8653</sshPrnamt>
           <sshPrnamtType>SH</sshPrnamtType>
       </shrsOrPrnAmt>
       <investmentDiscretion>SOLE</investmentDiscretion>
       <votingAuthority>
           <Sole>8653</Sole>
           <Shared>0</Shared>
           <None>0</None>
       </votingAuthority>
   </infoTable>
   <infoTable>
       <nameOfIssuer>EATON CORP PLC</nameOfIssuer>
       <titleOfClass>COMMON STOCK</titleOfClass>
       <cusip>G29183103</cusip>
       <value>716</value>
       <shrsOrPrnAmt>
           <sshPrnamt>9654</sshPrnamt>
           <sshPrnamtType>SH</sshPrnamtType>
       </shrsOrPrnAmt>
       <investmentDiscretion>SOLE</investmentDiscretion>
       <votingAuthority>
           <Sole>9654</Sole>
           <Shared>0</Shared>
           <None>0</None>
       </votingAuthority>
   </infoTable>
</informationTable>
