摘要
根据铸体薄片、扫描电镜、黏土矿物X线衍射、地层水及物性参数等资料,分析塔里木盆地库车坳陷依奇克里克构造带下侏罗统阿合组砂岩的岩石学、成岩作用及地层水等特征,结合依奇克里克构造带阿合组热史—埋藏史、裂缝和断层分布规律,探讨依奇克里克背斜轴部和翼部阿合组砂岩储层成岩流体封闭性特征及其油气保存条件。结果表明:依奇克里克背斜轴部阿合组砂岩自生高岭石体积分数较高,背斜翼部的较低;背斜轴部与翼部阿合组砂岩成岩演化序列出现差异的时间距今约为5 Ma;相较于背斜翼部,背斜轴部阿合组地层水中钠氯系数及脱硫系数较高,变质系数较低;背斜轴部阿合组砂岩的成岩流体系统封闭性比背斜翼部的弱,影响天然气聚集。该结果对预测依奇克里克构造带油气藏分布具有指导意义。
Based on the data of thin section,scanning electron microscope,X-ray diffraction of clay minerals,formation water and physical property parameters,we systematically analyzed the petrology,diagenesis and formation water of the Lower Jurassic Ahe Formation sandstone in the Yiqikelike Structural Belt of Kuqa Depression,Tarim Basin,combined with the thermal-burial history and the distribution law of fractures and faults of the Ahe Formation in the Yiqikelike Structural Belt,the sealing characteristics of diagenetic fluid,and the oil and gas preservation conditions of the Ahe Formation sandstone reservoirs in the axis and limb of Yiqikelike Anticline are discussed.The results show that volume fraction of authigenic kaolinite in the Ahe Formation sandstone is relatively high in the anticline axis,but relatively low in the limb.The difference of diagenetic evolution sequence between the axis and limb of the Yiqikelike Anticline is about 5 Ma ago.Compared with the anticline limb,the sodium chloride coefficient and desulfurization coefficient in the formation water of Ahe Formation in the anticline axis are higher,and the metamorphic coefficient is lower;the sealing property of diagenetic fluid system of the Ahe Formation sandstone in the anticline axis is weaker than that in the anticline limb,which affects the accumulation of natural gas.The results have great significance for predicting the distribution of oil and gas reservoirs in Yiqikelike Structural Belt.
作者
倪玲梅
李忠
郭春涛
罗威
NI Lingmei;LI Zhong;GUO Chuntao;LUO Wei(School of Culture and Tourism,Qujing Normal University,Qujing,Yunnan 655011,China;Institute of Geology and Geophysics,Chinese Academy of Sciences,Beijing 100029,China;Department of Geological and Environmental Engineering,Shanxi Institute of Technology,Yangquan,Shanxi 045000,China;Beijing National Day School,Beijing 100039,China)
出处
《东北石油大学学报》
CAS
北大核心
2022年第2期45-57,I0004,共14页
Journal of Northeast Petroleum University
基金
国家自然科学基金项目(41802171)
云南省科技厅基础研究项目(2019FD102)。
