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吐哈盆地内的巴喀油田属于裂缝性低渗透油气藏,油藏地质特征适合于水平井开采。根据油田的实际情况,选取了2口套变井作为试验对象,它们同具有油层厚度大、层位较为单一、裂缝较发育、设计水平段剩余油相对富集区域的特点。实施过程中,由于工艺技术的欠缺和地质认识上的差异造成2口井低产。在分析原因的基础上认识到水平井设计方面要特别加强油田油藏地质特征、目的层剩余油分布状况和裂缝发育分布规律的研究,优选出剩余油较富集、裂缝又相对发育的有利区域作为侧钻目标,尽可能规避风险。
The Baka oilfield in Turpan-Hami basin belongs to fractured low-permeability reservoirs, and its geological features are suitable for horizontal well exploitation. According to the actual situation of the oil field, 2 sets of casing wells are selected as test objects. They have the characteristics of large reservoir thickness, single layer, more developed fractures, and relatively concentrated area of remaining oil in the designed horizontal section. In the process of implementation, two wells were low-yield due to the lack of technology and geological differences. On the basis of analyzing the reason, we recognize that the horizontal well design should especially strengthen the geological characteristics of the oilfield reservoir, the distribution of the remaining oil in the target layer and the development and distribution of the fractures, and select the favorable area where the remaining oil is more abundant and the fractures are relatively developed As a sidetracking goal, try to avoid risks.