松辽盆地杏树岗地区扶余油层构造裂缝分布定量预测研究

发布时间：2018-01-14 12:37

本文关键词：松辽盆地杏树岗地区扶余油层构造裂缝分布定量预测研究　出处：《东北石油大学》2017年硕士论文　论文类型：学位论文

【摘要】：杏树岗地区为松辽盆地北部大庆长垣背斜的一部分,位于长垣构造的中部,包括杏树岗背斜、太平屯背斜、高台子背斜、杏西鼻状构造、高西鼻状构造,其中杏树岗背斜形态较完整,轴向近北北西向,圈闭线构造深度-1380m,圈闭面积147km2,闭合高度100m,高点海拔-1280m;构造幅度较大、断层较发育。研究区扶余油层主要为浅水湖泊三角洲沉积。根据岩心样品分析,杏树岗地区扶余油层有效孔隙度大于12%占43.5%,平均小于15%,空气渗透率分别在0.1-20.4mD,平均小于2mD属低孔、特低渗储层。就目前的开发情况来看,还有大量的剩余石油资源未被开发,资源潜力巨大。为了有效动用扶余油层储量,急需裂缝、地应力研究,为开发方案编制提供合理的注采井网。综合测井、地震、生产测试及岩心室内实验分析资料,采用有限元数值模拟技术对现今应力场进行模拟,并计算了孔隙度和渗透率;利用基于裂缝成因、地震属性、人工神经网络的裂缝识别预测技术,对裂缝进行识别和预测。结果表明:(1)杏树岗地区扶余油层的裂缝走向以NW向为主,少量为NE向;(2)主要造缝期为青山口期末;(3)扶余油层水平最大主应力集中在NE70°;(4)对杏71区块进行了现今应力场数值模拟,应力场模拟结果与实测结果对比,误差小于15%,模拟结果真实可靠。
[Abstract]:Xingshugang area is a part of Daqing anticline in the north of Songliao basin. It is located in the middle of Changyuan structure, including Xingshugang anticline, Taipingtun anticline, Gaotaizi anticline, Xingxi nose structure and Gaoxi rhinoid structure. Among them, Xingshugang anticline is relatively complete, its axial direction is nearly NNW, the trap line structure depth is -1380m, the trap area is 147km2, the closed height is 100m, the high altitude is -1280m; The Fuyu reservoir in the study area is mainly composed of shallow lacustrine delta sediments. According to the core sample analysis, the effective porosity of Fuyu reservoir in Xingshugang area is more than 12%, accounting for 43.5%. The average air permeability is 0.1-20.4mD, and the average less than 2mD is low porosity and ultra-low permeability reservoir. In order to effectively use the reserves of Fuyu reservoir, it is urgent to study the fractures and in-situ stress, which provides a reasonable injection-production well network and comprehensive logging for the development scheme. The present stress field is simulated by finite element numerical simulation technique, and porosity and permeability are calculated. The fracture identification and prediction technology based on fracture origin, seismic attribute and artificial neural network is used to identify and predict the fracture. The result shows that the fracture strike of Fuyu oil layer in Xingshugang area is mainly NW direction. A little is NE; (2) the main jointing period is the end of Qingshankou; (3) the maximum horizontal principal stress of Fuyu reservoir is concentrated in NE70 掳; (4) the numerical simulation of the stress field in Xing71 block is carried out. Compared with the measured results, the error of the simulation results is less than 15. The simulation results are true and reliable.
【学位授予单位】：东北石油大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：P618.13

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