摘要
针对地层压力数据以及梯度运算方法中存在不确定性从而导致运算结果存在较大偏差的问题,提出一种基于多点测试的石油勘探地层压力梯度分布方法。运用多点测斜仪测试地层深度,并自动跟踪深度,利用积分方法完成近似求解,获得压力分布规律和动边界传播规律的解析,通过压力预测试曲线获得地层压力,并构建地层压力的深度剖面,综合考虑测压点流体性质和压力系数的变化,根据压力梯度合理运算变化数值获得石油勘探地层压力梯度分布状况。仿真验结果表明,所提方法运算结果较为准确,能够节省大量时间,具有高效性、可靠性以及适用性。
The uncertainty of formation pressure data and gradient calculation may lead to the big deviation of calculation results.Therefore,a method of formation pressure gradient distribution in oil exploration based on multi-point test was presented.The multi-point inclinometer was used to test the formation depth and automatically track it.The approximate solution was completed by integral method.Then,the analysis of pressure distribution law and moving boundary propagation law was obtained.The formation pressure was obtained by pre-test curve of pressure.Meanwhile,the depth profile of formation pressure was constructed.The change of fluid property and pressure coefficient at the pressure measuring point was considered comprehensively.Finally,the change value was calculated reasonably by the pressure gradient.Thus,the distribution of formation pressure gradient was obtained.Simulation results show that the proposed method is more accurate than traditional method,so it can save a lot of time.In addition,this method has high efficiency,reliability and applicability.
作者
尹建尧
尹兵祥
YIN Jian-yao;YIN Bing-xiang(College of Control Science and Engineering,China University of Petroleum,Qingdao Shandong 266580,China;School of GeoSciences,China University of Petroleum,Qingdao Shandong 266580,China)
出处
《计算机仿真》
北大核心
2020年第8期58-62,共5页
Computer Simulation
关键词
多点测试
地层压力
梯度分布
深度剖面
Multi-point test
Formation pressure
Gradient distribution
Depth profile
