基于震源机制关系的长宁-威远区块套管变形分析
发布时间：2019-05-30 01:43
【摘要】：四川长宁-威远页岩气示范区套管变形问题突出,天然裂缝或断层是导致套管变形的主要因素。为了明确引起套管变形的裂缝或断层尺度与微地震震级之间的关系,分析了圆形断层模型的震源参数关系,建立了由断层半径、滑移距离、地震矩和矩震级等参数组成的数学模型。首先根据24臂井径测井数据或通过套管变形点的磨鞋最大直径来确定断层的滑动量(即套管变形量),然后利用该模型计算得到引起套管变形的裂缝或断层的半径和微地震震级。计算结果表明,引起长宁-威远区块套管变形的裂缝或断层的半径为100~400m,微地震距震级为2.0~3.5,这与现场实测数据吻合,表明该模型在长宁-威远区块具有一定的可靠性和实用性,也验证了套管变形机理的正确性。研究结果对于井眼轨道优化设计、压裂过程中的实时微地震监测与套管变形预防及治理具有一定的指导作用。
[Abstract]:The casing deformation problem is prominent in Changning-Weiyuan shale gas demonstration area of Sichuan Province, and natural cracks or faults are the main factors leading to casing deformation. In order to clarify the relationship between the fracture or fault scale causing casing deformation and the magnitude of microearthquakes, the relationship between focal parameters of circular fault model is analyzed, and the fault radius and slip distance are established. A mathematical model composed of parameters such as seismic moment and moment magnitude. First of all, the slip amount of the fault (that is, casing deformation) is determined according to the 24-arm well diameter logging data or through the maximum diameter of the casing deformation point. Then the radius of cracks or faults causing casing deformation and the magnitude of microearthquakes are calculated by using the model. The calculation results show that the radius of cracks or faults causing casing deformation in Changning-Weiyuan block is 100 鈮，
本文编号：2488403
[Abstract]:The casing deformation problem is prominent in Changning-Weiyuan shale gas demonstration area of Sichuan Province, and natural cracks or faults are the main factors leading to casing deformation. In order to clarify the relationship between the fracture or fault scale causing casing deformation and the magnitude of microearthquakes, the relationship between focal parameters of circular fault model is analyzed, and the fault radius and slip distance are established. A mathematical model composed of parameters such as seismic moment and moment magnitude. First of all, the slip amount of the fault (that is, casing deformation) is determined according to the 24-arm well diameter logging data or through the maximum diameter of the casing deformation point. Then the radius of cracks or faults causing casing deformation and the magnitude of microearthquakes are calculated by using the model. The calculation results show that the radius of cracks or faults causing casing deformation in Changning-Weiyuan block is 100 鈮，
本文编号：2488403
本文链接：https://www.wllwen.com/kejilunwen/shiyounenyuanlunwen/2488403.html
