高温高密度页岩气固井技术研究及应用

周福新，王晓亮，宋建建4中石化江汉石油工程公司钻井一公司，湖北 潜江

2非常规油气湖北省协同创新中心(长江大学)，湖北 武汉

3荆州嘉华科技有限公司，湖北 荆州

4长江大学石油工程学院，湖北 武汉

高温高密度页岩气固井技术研究及应用

周福新1，王晓亮2,3*，宋建建41中石化江汉石油工程公司钻井一公司，湖北 潜江

2非常规油气湖北省协同创新中心(长江大学)，湖北 武汉

3荆州嘉华科技有限公司，湖北 荆州

4长江大学石油工程学院，湖北 武汉

随着页岩气井勘探开发的不断深入，深层页岩气勘探开发技术成为技术人员的研究重点。深层页岩气普遍存在的高温、高密度等地质特征对现有钻完井技术尤其是固井技术无疑是个挑战。如何提高深层页岩气井的固井质量，是深层页岩气井勘探开发成功的关键。通过系统分析深层页岩气井固井过程中所面临的难题和挑战，提出了提高深层页岩气井固井质量的5项技术措施。将该技术措施与现场井况相结合，应用于深层页岩气井产层固井作业中，72 h候凝测井显示固井质量优质。

页岩气，固井，高温高密度，韧性水泥浆

AbstractWith the continuous deepening of exploration and development of shale gas wells, the deep shale gas exploration and development technology has become the focus of technical personnel. The deep shale gas was commonly characterized by high temperature, high density and other geological features, which was undoubtedly a challenge in existing drilling and well completion technology, especially in cementing technology. How to improve the cementing quality of deep shale gas wells was the key to the success of exploration and development in deep shale gas wells. In this paper, five technical measures are proposed to improve the quality of cementing of deep shale gas wells by analyzing the problems and challenges in the cementing process. In combination with the field conditions and the technical measures, the technology is applied to the cementing operation of deep shale gas wells; 72 hours curing well logging shows that the quality of cementing is good.

KeywordsShale Gas, Cementing, High Temperature and High Density, Toughness Cement Slurry

1. 引言

近年来，页岩气勘探开发取得了重大突破，相应的开发技术已经成为研究热点。随着页岩气勘探开发的不断深入，开发技术逐步向深井方向发展，因而钻遇高温、高压地层的概率显著增大[1][2][3]。由于页岩气大多采用水平井钻井技术与体积压裂技术相结合的开采方式，对固井质量要求较高，再加上高温、高压地层固井作业的挑战，给固井带来困难，固井质量难以保证,也给固井提出了新的课题。……