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位于塔里木盆地库车坳陷克拉苏构造带中部的克深2气藏,其储集层白垩系巴什基奇克组是库车山前的主力产气层,具有埋藏深度大、基质物性差的特征,裂缝的普遍发育对产量影响大。克深2气藏单井裂缝纵横向发育特征差别较大,目前仍缺少对克深2气藏裂缝带发育模式及其与产量的关系研究,无法做到有效地指导高产井的部署。利用钻井取心、FMI成像并结合地应力、测试资料,开展了克深2气藏纵横向裂缝带发育特征、形成机制的研究,探讨多种成因裂缝带与产量之间的关系,并提出相应的储层改造建议。取得如下认识:1根据裂缝产状,将克深2气藏裂缝发育带在空间上分为纵张裂缝带、网状裂缝带及调节裂缝带3种类型。纵张裂缝带平面上近EW走向,调节裂缝带平面上近SN走向,网状裂缝带则表现为多组走向。2克深2气藏并非平面上裂缝线密度越大、气产量越高,其主要受钻井液体系、钻揭储集层厚度、成像质量3个方面的影响。3克深2气藏发育的3种裂缝带主要受控于中和面效应、构造调节带2种因素。4根据克深2气藏的实钻地质资料、测试资料、构造位置及3种裂缝带的空间组合关系,将克深2气藏平面分为4个等级布井区,为今后克深2气藏开发井部署及相似气藏的高产井部署提供理论依据。
The Cretaceous Bashijiqike Formation of Cretaceous located in the middle of Kelassu tectonic belt in the Kuqa depression of the Tarim Basin in the Tarim Basin is the main gas generating layer in the front of the Kuqa Piedmont. It has the characteristics of large buried depth and poor matrix physical properties The general development of fractures has great influence on the yield. The characteristics of vertical and horizontal development of single well in KeShen-2 gas reservoirs vary widely. At present, there is still a lack of research on the development pattern of crack zone and its relationship with yield in KeShen-2 gas reservoir, which can not effectively guide the deployment of high-production wells. Based on the drilling coring, FMI imaging and geostress and test data, the development characteristics and formation mechanism of the vertical and horizontal fracture zones in the Keshen-2 gas reservoir are studied, and the relationship between the multiple fracture zones and the yield is discussed. Correspondingly, Reservoir Improvement Suggestions. The following findings are obtained: 1 According to the occurrence of fractures, the fracture development zones of Qs2 gas reservoir are divided into three types: longitudinal tension fracture zone, net fracture zone and regulation fracture zone. Longitudinal cracks in the plane near the EW trend to adjust the crack near the surface of the SN trend, mesh fracture zone is manifested as more sets of trends. 2 g deep 2 gas reservoirs are not affected by the greater density of fracture lines in the plane and the higher gas production, which is mainly affected by the drilling fluid system, the thickness of the drilled reservoir and the imaging quality. The 3 kinds of fractured zone developed in 3 g deep 2 gas reservoirs are mainly controlled by neutralization surface effect and structural adjustment zone. According to the real drilling geological data, test data, structural position and the spatial combination of three kinds of fractured zones in Ke Shen 2 gas reservoir, the plane of Ke Shen 2 gas reservoir is divided into 4 levels of well distribution area, Reservoir development and deployment of wells and similar wells to provide a theoretical basis for the deployment of high-yield wells.