套损低压区压力界限研究  

A STUDY ON PRESSURE LIMIT IN LOW PRESSURE CASING DAMAGE ZONE

作　　者：袁新强[1] 王友斌 

机构地区：[1]大庆石油管理局

出　　处：《石油勘探与开发》1997年第4期64-67,共4页Petroleum Exploration and Development

摘　　要：在深入调查分析大庆油田南二区西部套损特征的基础上，在该区建立了15个标桩测量点，对大地三雏形变进行监测，来研究地层形变与地层压力关系。根据实际地质参数，建立16km2、10400个节点的地质模型，对三维位移场进行了历史拟合和连续3年动态模拟计算，计算结果和实际监测数据一致。为此，分3个不同地质构造区块，即地层倾角大于产的开发区块、地层倾角小于产的开发区块以及断层密集分布（间距小于600m）开发区块，来确定在防止单井套管损坏条件下，套损低压区可恢复的地层压力界限表达式。该方法操作简单，便于动态管理。该方法在其它开发区块中应用后，经实践检验切实可行。This paper, based on investigations and analyses of the damage characteristics of the casings in the west of South Block 2 of Daqing oil field, studies the relation between the deformation and the pressure of the formation by staking out 15 measuring points and monitoring the 3D deformations in the earth. According to the actual geological parameters, a geological model was established covering 16 km2 and including 10,400 nodes. The 3D displacement field was matched historically and has been computed by dynamic simulation for 3 successive years. The results agree with the actual data. So the geological model area is divided into three different sections according to its geological constructions. The first 2 sections are that those formation inclination angles are bigger and smaller than 7° respectively. The other section is that the faults are distributed densely with spacings smaller than 600m. According to this classification, the limit expression for recoverable formation pressure in the pressure zone of casing damage has heen derived under the condition of preventing individual casing from damage. The method can be operated easily and is convenient for performance managing. It has been verified to be applicable in other development areas.

关 键 词：生产井 套管损坏 地层压力 数值模拟 油田 

分 类 号：TE331.3[石油与天然气工程—油气田开发工程]