基于西原模型改进的一种泥岩蠕变模型  

Modified Mudstone Creep Model Based on Nishihara Model

作　　者：田小朋 李东林 张伯虎[1] 马瑞元 TIAN Xiaopeng;LI Donglin;ZHANG Bohu;MA Ruiyuan(School of Geoscience and Technology, Southwest Petroleum University, Chengdu610500, China;Shaanxi Aerospace Technology Industry Co., Ltd., Xi'an 710025, China;School of Civil Engineering and Architecture, Southwest Petroleum University, Chengdu 610500, China)

机构地区：[1]西南石油大学地球科学与技术学院,四川成都610500 [2]陕西宇航科技工业有限公司,陕西西安710025 [3]西南石油大学土木工程与建筑学院,四川成都610500

出　　处：《成都大学学报（自然科学版）》2018年第4期426-429,共4页Journal of Chengdu University（Natural Science Edition）

摘　　要：在砂泥岩互存的油气储层,两种岩石受长期油气注采生产中的差异化蠕变影响会产生不同的位移,导致采油井筒发生剪切破坏.泥岩在含水时变形较大,对注采安全影响较大,因此研究含水情况下的泥岩蠕变性能显得十分重要.本研究以典型西原蠕变模型为基础,添加含水元件,建立与含水量相关的泥岩蠕变模型,同时选取实际油田中一井网为研究对象,建立注采数值模型,通过控制注采比来调节地层中的含水量,验证了改进泥岩蠕变模型的正确性与合理性.研究成果能更好地指导注采过程中泥岩蠕变变形的计算,从而对井筒套损剪切破坏进行预测与控制.In the oil and gas reservoirs where sand and mudstonesco-exist,the differential creep of the two rocks during long-term oil and gasinjection production produces different displacements,which results in shear failure of the production wellbore.However,the mudstone deforms greatly when it contains water,which has great influence on the safety of injection and production.Therefore,it is very important to study the creep performance of mudstone underwater-bearing conditions.A mudstone creep model related to water content is established,which is based on the typical creep model-Nishihara model by adding anaquiferous component.In addition,an actual oilfield well network is selected asthe research object;an injection-production model of oil and water wells is established.The water content of mudstone is adjusted by controlling the injectionproduction ratio.The correctness and rationality of the modified mudstone creepmodel are verified.The research results can better guide the calculation of mudstone creep deformation in the injection and mining process,and thus be used topredict and control the casing damage of the wellbore.

关 键 词：泥岩蠕变 西原模型 含水元件 注采比 

分 类 号：TE311.2[石油与天然气工程—油气田开发工程]