苏里格气田致密底水气藏堵水压裂技术

Water Plugging and Fracturing Technology for Tight and Bottom-Water Gas Reservoir in the Sulige Gas Field

文果 蒋文学 郑维师

WEN Guo JIANG Wenxue ZHENG Weishi

中国石油集团川庆钻探工程有限公司钻采工程技术研究院, 陕西西安 710018; 低渗透油气田勘探开发国家工程实验室, 陕西西安 710018

Technology & Engineering Research Institute, CNPC Chuanqing Drilling Engineering Co., Ltd., Xi’an, Shaanxi, 710018, China; National Engineering Laboratory of Low-Permeability Oil & Gas Fields Exploration and Development, Xi’an, Shaanxi, 710018, C

针对苏里格气田致密底水气藏压裂改造后易沟通水层，造成含水率上升快，有效期短等问题，通过自主研发固化封堵剂，基于颗粒沉降规律和压裂裂缝的扩展情况，结合苏里格气田E区块的储层地质特征，优选射孔位置等工艺参数，将堵水与压裂结合在一起形成了底水致密气藏堵水压裂技术。苏里格气田E区块的14口井应用了堵水压裂技术，与采用常规压裂技术的邻井相比，平均产水量降低了62.6%，平均产气量提高明显。这表明固化封堵剂可在储层条件下固化形成低渗封堵层封堵底水上升，实现降低产水量，提高产气量的目的。

Upon completion of fracturing operations,tight gas reservoirs with bottom water may communicate with water-bearing formations,and consequently may cause rapid increases in water cut and reduce the production period. Under such circumstances,an innovative plugging agent has been developed independently. With consideration to rules of grain settlement,patterns in fractures growth,geologic features in reservoir formations of Block E of the Sulige Gas Field,optimized perforation positions and other process parameters,the plugging agent can be used in combination with fracturing operations for water plugging and fracturing in gas reservoirs with bottom-water. The newly developed technology was applied in 14 wells in Block E of the Sulige Gas Field. Compared with performances of neighboring wells with conventional fracturing technologies,the well with the innovative technology has average water production reduction of 62.6%,while gas production increased dramatically. Research results showed that the plugging agent can form low-permeability layers under reservoir conditions to prevent bottom water coning. In this way,relevant wells may have reduced water production and enhanced gas production while effectively controlling bottom water effectively.

中石油集团公司重大技术现场试验与应用项目"拖动压裂与底水油气藏堵水压裂工艺技术研究与应用"（编号：2014T-003-009）部分研究内容。

https://doi.org/10.11911/syztjs.201704017