水力压裂形成裂缝形态的研究
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摘要
油层水力压裂形成的裂缝形态与油层是否有天然裂缝和油层所受地应力及其相应方向的岩石抗张强度有关。本文通过对吉林、大庆油田的水力压裂形成缝形形态研究，认为油层结构是压裂所形成缝形形态的重要条件，但油层三向地应力是决定因素。进一步研究认为同一时代地层的地应力的相对大小的关系是固定的，不因地层埋藏深度而变迁。
Fracture geometry of fractures induced by hydrofracturing is affected by the geostress and rock strength in their relative direction and where the natural fracture system is present or not. By a study of the fracture geometry in the bydrofracturing jobs experienced in Jilin and Daqing oil fields, this paper suggests that reservoir rock structure is an important condition of fracture geometry, however, 3-D geostresses in the decisive factor. A futher study shows that the relative magnitude of the geostress in the same formations fairly constant independent to their depth of burial.
Fracture geometry of fractures induced by hydrofracturing is affected by the geostress and rock strength in their relative direction and where the natural fracture system is present or not. By a study of the fracture geometry in the bydrofracturing jobs experienced in Jilin and Daqing oil fields, this paper suggests that reservoir rock structure is an important condition of fracture geometry, however, 3-D geostresses in the decisive factor. A futher study shows that the relative magnitude of the geostress in the same formations fairly constant independent to their depth of burial.
引文
1周望，何师荣，赵春生．大庆油田压裂裂缝形态及特征．北京：石油工业出版社，1988．354～3592王仲茂．地壳应力分析在低渗砂岩油田开发中应用．见：地壳构造与地壳应力文集，第6期．北京；地震出版社，1993．59～633刘翔粪，张景和．利用岩石发射Kaiser效应测地应力的新方法．岩石力学与工程学报，1987，4（6）4王鸿勋，张琪等编．采油工艺原理（修订本）．北京：石油工业出版社，1989．205～2125国家地震局地壳应力研究所情报室编译．地应力测量理论研究与应用．北京：地质出版社，1987
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