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塔里木盆地北部地区的断裂构造对油气的形成、运移、储集和保存具有极为重要的控制作用。大型多期活动断裂控制了大型隆起和拗陷的形成、发展和演化,是各时期油源纵向运移的良好通道;小型或次级断裂以及由断裂产生的节理、裂隙等,可改善储层的性能,是该区各种储油构造形成的主要构造条件。笔者认为,油气的运移和聚集最主要的条件是构造应力驱动。为了将断裂构造活动的构造应力场与油气运移的物质场结合起来,建立了构造应力驱动与岩内流体运动的理论方程,这个方程反映了构造应力、流体内压和运移势之间的微分关系。笔者对该区已知油田不同类型断裂机制的储油构造型式、油气富集条件及部位进行了理论分析和模拟计算,进而对主要构造区块选择典型剖面模拟计算运移势状态,并与已知油田进行类比,找出油气运移和储集的有利地区,为塔北地区油田勘探提出了预测意见。
The fault structure in the northern part of Tarim Basin plays an extremely important role in controlling the formation, migration, accumulation and preservation of oil and gas. Large-scale multi-period active faults control the formation, development and evolution of large uplifts and depressions, which are good channels for longitudinal migration of oil sources in various periods. Small or secondary faults and joints and fissures produced by faults can improve the reservoir The performance is the main tectonic conditions for the formation of various oil reservoirs in this area. In my opinion, the most important condition for hydrocarbon migration and accumulation is tectonic stress drive. In order to combine the tectonic stress field of fault tectonics with the material field of hydrocarbon migration, a theoretical equation of tectonic stress-driven and fluid motion in the rock is established, which reflects the differential between tectonic stress, fluid pressure and migration potential relationship. The author has made theoretical analysis and simulation calculation on the oil reservoir structure types, oil and gas accumulation conditions and locations of different types of fault mechanism known in the oilfield, and then selected the typical sections of the main tectonic blocks to simulate the migration potential state, Know the oil field analogy to identify favorable areas for oil and gas migration and accumulation for the exploration of oil fields in northern Tarot made predictions.