气测录井技术在库车坳陷的研究与应用

Research and application of gas logging technology in Kuqa Depression

库车坳陷油气资源丰富,目的层系为古近系底砂岩及下白垩统砂岩。但该套储层岩性致密,油质轻,同一构造区域,同一目的层段油气显示程度不同,有的井显示微弱,但却获工业油气流,有的井显示良好,但测试无产出。该套储层气测显示值与产能关系不明显,给准确评价储层带来很大的困难。通过近两年钻探井气测资料分析,有些井的气测显示及组分参数呈规律变化,提出了基于气测录井的解释标准并成功应用,对库车坳陷油气层开发具有一定的指导意义。

Rich in oil and gas resources,the target strata of Kuqa Depression are Paleogene bottom sandstone and Lower Cretaceous sandstone.However,the reservoirs have tight lithology and light oil quality,and the same target strata in the same structural area shows different degree of oil and gas display as weak display in some wells while industrial oil and gas flow is obtained,and good display in some wells while no output tested.The vague relationship between gas logging value and capacity of the reservoirs brings great difficulties to accurate reservoir evaluation.Through the analysis of gas logging data of drilling wells in the past two years,the gas logging display and component parameters of some wells show regular changes.An interpretation standard based on gas logging is proposed and successfully applied,which has certain guiding significance for the development of oil and gas reservoirs in Kuqa Depression.