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OALib Journal期刊
ISSN: 2333-9721
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白云岩储层地质力学特征分析及在储层改造优化应用——以塔中东部为例
Keywords: 白云岩,地质力学,天然裂缝,开启率,可压裂性,压裂优化
Abstract:
？针对塔里木油田塔中东部中下寒武统白云岩储层岩性组分复杂，石膏含量较高，压裂改造效果差等问题，在岩石力学实验、岩石组分精细确定基础上建立白云岩储层弹性模量、泊松比、强度、可压裂性等计算模型，并分析不同岩性组分岩石力学参数的影响规律，同时通过井筒资料分析地应力方位，建立地应力计算模型，分析不同组分含量对地应力影响，确定精细地应力剖面，并分析纵向变化规律|另一方面，开展天然裂缝产状信息处理、提取，分析主应力与裂缝走向关系，利用已压裂井资料确定天然裂缝内聚力、滑动摩擦系数，并定量计算天然裂缝面正应力、剪应力，确定不同注入压力下的开启率，从而确定中深5井超深、致密、含膏白云岩储层以压裂为主的改造方案，在此基础上根据分层应力剖面、水平应力差、地层可压裂性、天然裂缝力学特征优化压裂施工层段、泵注程序、分段射孔簇、施工压力等。
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