气体钻井转水基钻井条件下泥页岩水侵规律  

Law of Water Invasion in the Shale Formation When the Gas Drilling is Changed to Drilling with Mud

作　　者：周玉良[1] 孟英峰[1] 李皋[1] 胡力 唐思洪 赵向阳[4] 刘骁[5] 

机构地区：[1]西南石油大学油气藏地质及开发工程国家重点实验室,成都610500 [2]川中油气矿南充采油气作业区,四川南充637100 [3]广汉采气院,四川广汉618300 [4]中国石化石油工程技术研究院,北京100101 [5]延长石油集团油气勘探公司,陕西延安716000

出　　处：《地质科技情报》2011年第5期123-126,共4页Geological Science and Technology Information

基　　金：国家高技术研究计划(863计划)项目"气体钻井技术与装备"(2006AA06a103)

摘　　要：运用数学模型和实验模拟,开展了针对气体钻井转水基钻井条件下泥页岩近井壁地带的水侵规律研究。通过数学模型对该条件下的水侵过程进行模拟,得到了泥页岩近井壁地带内的含水饱和度和孔隙水(气)压力分布,并依据含水饱和度计算出水侵距离,对水侵范围进行了预测。同时,运用西南石油大学国家重点实验室欠平衡钻井室自主研发的欠平衡钻井多功能评价仪,对地层温度、压力进行模拟,展开了对气体钻井转水基钻井条件下泥页岩的水侵规律实验研究,得到了岩心中的水侵范围,并与理论预测的水侵范围进行了对比验证,结果表明数学模型能很好地预测气体钻井转水基钻井条件下泥页岩近井壁地带内的水侵范围。This paper studies the law of water invasion in the clay shale formation with mathematical model and simulation when gas drilling is changed to water-based drilling.The mathematical model makes it possible to obtain the distribution of water saturation and the distribution of water and gas pressure.According to the distribution of water saturation,it is possible to calculate the distance of water invasion,and predict the range of water invasion.At the same time,we have developed the experimental research with underbalanced drilling multi-function evaluation apparatus,which can simulate the temperature and pressure of the shale formation.Also we can get the range of water invasion in the core,which contrasted with the theory prediction we can find that the mathematical model can accurately predict the range of water invasion in the clay shale formation when gas drilling is changed to water-based drilling.

关 键 词：泥页岩 水气两相渗流 气体钻井 水侵范围 

分 类 号：TE252[石油与天然气工程—油气井工程]