【作者】 朱定军；

【导师】 单钰铭；

【作者基本信息】 成都理工大学 ， 油气田开发工程， 2009， 硕士

【摘要】 本论文利用实验室测试的大量岩石力学数据、结合岩石声发射法、差应变及剩磁方法、测井法等对川东北地区河坝构造整个地层(以陆相为主)的岩石力学性质、地应力场及三大压力剖面进行了计算、分析,并对其中典型的工程问题井段做了事故原因解释。通过本次研究,主要取得了以下认识:结合通南巴构造带地质特征及河坝构造的钻完井资料、岩心薄片分析资料对研究区的陆相地层及海相地层有了更清楚的认识。在成都理工大学油气藏地质及开发工程国家重点实验室对研究区陆相和海相两套地层基础物性参数和岩石力学参数测试的基础上,根据实验数据系统分析了陆相及海相的岩石强度参数、动静弹性参数等力学参数的实验特征。利用实验室分析成果和声波时差测井、密度测井等资料,构建了纵横声波时差、抗张强度、抗压强度、内聚力、内摩擦角及动静弹性参数关系等十个岩石力学参数模型;将实验室数据和测井数据有机结合,建立了河坝构造典型井段的岩石力学参数剖面。针对研究区陆相地层的现今地应力在剖面上的分布特征,选用葛式模型,利用声发射数据处理后的绝对应力值获取公式各项参数,建立该区的地应力计算模型。通过差应变方法的校验,确定了最终的地应力模型;同时采用波速各项异性法及古地磁测试法确定了研究区陆相地层的地应力方向,并建立典型井的陆相地应力剖面。分析了研究区的破裂压力、坍塌压力及地层孔隙压力特征,经过对比分析选用了适合该工区的各个计算模型。但由于该区块地应力及三个压力剖面方面的研究较少,地应力研究通过两种测试方法得到验证,破裂压力及坍塌压力剖面没有得到验证,仅供参考。最后建立了典型井的陆相综合解释剖面,选取典型工程事故发生层段进行事故原因分析,实现本次论文研究成果的工程应用价值。更多还原

【Abstract】 The paper mainly evaluates and analyzes the rock mechanical property,the ground stress field, the fracture pressure and the caving pressure section of whole layers( land facies mainly) at Heba structure in Northeastern-Sichuan by means of a great quantity of rock mechanical data combined with rock acoustic emission method,differential strain method and logging method. And then a interpretation for the culprit of the typical well sections which happened project accidents have obtained.On base of physical properties and rock mechanical properties of sea facies and land facies in region of interest are tested at the State Key Laboratory of Oil&Gas Reservoir Geology and Exploitation in Chengdu University of Technology , systemically analyzing the experiment characteristics of rock mechanical properties such as rock intensive parameters, dynamic-static elastic parameters in both land facies and sea facies. And more, I have a clear realization on this structure.By utilizing the outcome of lab analysis and logging datum, ten rock mechanical parameter models such as vertical-horizontal acoustic time,tensile strength,compression strength,cohesive force,angel of internal friction and the relationship of dynamic-static elastic parameters are established. Then rock mechanical parameters’cut plane of typical well section at Haba structure is building.After analyzing the ground stress distributing characteristics of region of interest and choosing model of Hongkui Ge, the ground stress calculated model have been constructed by gotten parameters from original acoustic travel datum. And then the ultimate ground stress model and direction, typical ground stress cut plane of land facies are gained by means of differential strain method checking.Finally through analyzing the of fracture pressure,caving pressure and pore pressure,three calculation models are building and explanation cut plane of land facies of typical well is formation. Some typical formations with engineering accidents have been interpreted. But it just for referring because of never verified.更多还原