CAJ | 학술논문

利用优化反分析方法获得目标区地应力场分布,并考虑储集层岩石多轴应力状态,提出了储集层裂缝预测分析的多参数判据法.该方法采用基于多个岩石材料参数建立的破坏曲面作为边界条件,通过研究应力状态函数与破坏曲面间的相互关系预测分析储集层裂缝发育情况,并根据关键井处的实测裂缝参数计算得出储集层平面内各点处的裂缝密度.利用该方法对江苏油田某区块油藏进行计算分析,研究了储集层关键井点处裂缝密度与数值模拟得出的发育指数间的关系,结果表明储集层裂缝体密度与发育指数的常用对数间具有较好的线性关系.据此对该区块油藏裂缝发育程度及密度进行预测分析,计算结果表明该油藏目标层段储集层裂缝体密度主要分布在0.23～1.20 m~2/m~3且受断层和构造部位影响显著.图9表5参10
이용우화반분석방법획득목표구지응력장분포,병고필저집층암석다축응력상태,제출료저집층렬봉예측분석적다삼수판거법.해방법채용기우다개암석재료삼수건립적파배곡면작위변계조건,통과연구응력상태함수여파배곡면간적상호관계예측분석저집층렬봉발육정황,병근거관건정처적실측렬봉삼수계산득출저집층평면내각점처적렬봉밀도.이용해방법대강소유전모구괴유장진행계산분석,연구료저집층관건정점처렬봉밀도여수치모의득출적발육지수간적관계,결과표명저집층렬봉체밀도여발육지수적상용대수간구유교호적선성관계.거차대해구괴유장렬봉발육정도급밀도진행예측분석,계산결과표명해유장목표층단저집층렬봉체밀도주요분포재0.23～1.20 m~2/m~3차수단층화구조부위영향현저.도9표5삼10
The multi-parameter criteria method is proposed based on the in-situ stress distribution and properties of reservoir matrix to predict the fractures distribution. The in-situ stress of the study reservoir is obtained by inverse reliability-based approach. The reservoir fracture development degree is predicted by analyzing the relationship between stress state function and failure surface. The failure surface is established by utilizing several rock material parameters, serving as boundary conditions. The fracture density of reservoir is acquired using the measured fracture parameters of some key wells. A case study in Jiangsu Oilfield is investigated with the multi-parameter criteria method. The results show that there is a perfect linear relationship between fracture volume density and the common logarithm of fracture development index. The fracture volume density varies mainly from 0. 23 to 1.20 m~2/m~3. The fault structure and tectonic geometry both have significant influence on the fracture development.