Lithologies of Chang6 oil bearing set in Lijiacha area is grayish moderate-fine grain arkose in which intercalated beds are deep grey sandy shale and black mudstone.

• 李家岔区长6油层组岩性主要为浅灰色中细粒长石砂岩夹深灰色砂质泥岩及黑色泥岩。