胜利油田沙河街组页岩油水平井固井技术

A Cementing Technology for Horizontal Shale Oil Wells in Shahejie Formation of Shengli Oilfield

何立成

HE Licheng

中石化胜利石油工程有限公司, 山东东营 257000

Sinopec Shengli Oilfield Service Corporation, Dongying, Shandong, 257000, China

胜利油田沙河街组页岩油水平井固井时存在套管居中和安全下入难度大、水泥浆性能要求高和油基钻井液驱替困难等技术难点，为此研发了两亲冲洗隔离液体系、优选纤维膨胀水泥浆体系和塑性胶乳防窜水泥浆体系，并采取应用整体式弹性套管扶正器、偏心导向引鞋、漂浮顶替技术和环空加压等固井技术措施，初步形成了胜利油田沙河街组页岩油水平井固井技术。该固井技术在预探井YYP1井进行了现场试验，固井作业正常，声幅测井结果显示，一界面固井质量为优质，二界面固井质量为合格。研究与试验表明，该固井技术够解决胜利油田沙河街组页岩油水平井长水平段固井存在的技术难点，提高固井质量，满足大规模体积压裂对水泥环胶结质量的要求，可以在页岩油开发中进行推广应用。

The cementing of horizontal shale oil wells in Shahejie Formation of Shengli Oilfield faces some technical challenges, such as the difficulties in the casing centering and safe casing running, high performance requirements for cement slurry, and hard displacement of oil-base drilling fluids. In light of these, the amphiphilic flushing spacer system was developed , the fiber expanding and anti-channeling plastic latex cement slurry system were optimized. On this basis, a cementing technology was formed preliminarily for horizontal shale oil wells in Shahejie Formation of Shengli Oilfield by combining cementing equipments and measures including an integral elastic casing centralizer, an eccentric guide shoe, floating displacement, and annulus pressurization, etc. The cementing technology was tested on site in a preliminary prospecting well YYP1, with a normal cementing operation completed. The results of acoustic amplitude logging showed that the cementing quality of the first interface was quite high, and that of the second interface was qualified. As indicated by the research and tests, the proposed cementing technology can tackle technological problems in cementing for long horizontal sections of horizontal shale oil wells in Shahejie Formation of Shengli Oilfield and enhance cementing quality. It meets the requirements of large-scale volumetric fracturing for the cementing quality of cement sheaths and can be promoted and applied in the development of shale oil.

国家科技重大专项“济阳坳陷页岩油勘探开发目标评价”（编号：2017ZX05049004）、胜利石油工程有限公司科技攻关项目“济阳坳陷深层页岩油钻完井技术研究”（编号：SKG2001）联合资助

https://doi.org/10.11911/syztjs.2022062