用测井资料确定地层的破裂参数  

DETERMINING FORMATION RUPTURE PARAMETERS BY LOGGING DATA

作　　者：林学山[1] 

机构地区：[1]大庆石油管理局测井公司

出　　处：《大庆石油地质与开发》1990年第2期61-68,共8页Petroleum Geology & Oilfield Development in Daqing

摘　　要：本文所介绍的用测井资料确定地层破裂参数的方法,分为两部分,第一部分是先根据解决问题的需要提出假设,建立数学模型。然后根据假设和模型建立微分方程,提出定解条件,并解出该方程。利用方程的解推出地层应力及破裂参数的计算公式。第二部分是对现场资料进行处理,并把计算结果同实际的地层破裂压力资料进行对比,以验证数学模型的正确性,并对差距较大的情况进行分析。从4口井31层资料对比的结果看,绝大部分油层破裂压力梯度计算值与实际值相当接近,平均相对误差为±0.06。个别层段,由于对比井之间距离较大,岩性、密度变化较大,误差偏高,达0.20～0.32。<ABSTRACT> The method for determining the formation rupture parameters with logging data introduced in this paper consists of two parts. First, according to the need for solving the problems, puts forward hypotheses and establishes a meth-matiral model. Then, in the light of the hypotheses and model, sets up a differential equation, gives the solving conditions and solves the equation. Derives the formula for calculating the formation stress and rupture parameters with the solution of the equation.Second, processes the field data and contrasts the calculated results with the actual data of formation rupture pressrue so as to verify the correctness of the methematical model and analyzes the conditions with larger differences.In view of the results of contrast from the data of 31 layers in 4 wells, the calculated values of the rupture pressure gradient in most oil layers are considerably close to the actual values with an average relative error of ?.06. In a few layers, due to the longer distance between the coutrasted wells and the greater variations of lithologic character and density, the error becomes higher, up to 0.20~0 .32.

关 键 词：测井 地层破裂 压力梯度 地层应力 油层压裂 

分 类 号：TE357.11[石油与天然气工程—油气田开发工程] P542.3[天文地球—构造地质学]