碳酸盐岩储层地应力及裂缝测试技术——以塔河油田奥陶系碳酸盐储层为例
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摘要
储层改造中地应力场的分布决定着水力压裂裂缝的方向和高度,最大水平主应力方向是压裂裂缝的延伸方向。因此,地应力大小及方向的测量就显得尤为重要。介绍了声波各向异性、差应变及偶极声波测量地应力的原理及方法,并分别对塔河油田碳酸盐岩储层岩心测量结果进行了比较,结果证明3种测量方法结果比较一致,最后用嵌入式地面裂缝监测技术的测试结果(73口井)进行了验证,说明塔河油田奥陶系碳酸盐岩储层地应力分布遵循一定的规律,不同的区块、不同的井位,地应力分布虽稍有不同,但最大地应力方向主要分布在北偏东0～90°的范围内。
The distribution of stress field in reservoir reconstruction determined the direction and height of hydraulic fracturing, the maximum horizontal direction was the direction of fracture extension. Therefore it was especially important to measure the stress size and direction. The principle and method for measuring anisotropy, differential strain, dipole acoustic detected in-situ stress were introduced, the results of core test of carbonate reservoirs in Tahe Oilfield were contrasted respectively. The result indicates that the results from 3 measuring methods are consistent with each other. Eventually the test result of inserted surface fracture detection (73 wells) is used for demonstration, it shows that the stress distribution in carbonate reservoirs is according to certain rules. In different blocks and wells the maximum stress distribution is arranged from0~90, although in-situ stress distribution is slightly different.
The distribution of stress field in reservoir reconstruction determined the direction and height of hydraulic fracturing, the maximum horizontal direction was the direction of fracture extension. Therefore it was especially important to measure the stress size and direction. The principle and method for measuring anisotropy, differential strain, dipole acoustic detected in-situ stress were introduced, the results of core test of carbonate reservoirs in Tahe Oilfield were contrasted respectively. The result indicates that the results from 3 measuring methods are consistent with each other. Eventually the test result of inserted surface fracture detection (73 wells) is used for demonstration, it shows that the stress distribution in carbonate reservoirs is according to certain rules. In different blocks and wells the maximum stress distribution is arranged from0~90, although in-situ stress distribution is slightly different.
引文
[1]李培廉,张希明,陈志海,等.塔河油田奥陶系缝洞型碳酸盐岩油藏开发[M].北京:石油工业出版社,2003.
[2]李志明,张金珠.地应力与油气勘探开发[M].北京:石油工业出版社,1997.
[3]张景和,孙宗颀.地应力与裂缝测试技术在石油勘探开发中的应用[M].北京:石油工业出版社,2001.
[4]马建海,孙建孟.用测井资料计算地层应力[J].测井技术,2002,26(4):347~351.
[5]李正文,赵志超.地震勘探资料解释[M].北京:地质出版社,1988.
[6]崔荣旺.微地震压裂监测应在井中进行[J].大庆石油地质与开发,2007,26(4):138~142.
[7]Cipolla C L,Wright C A.State-of-the-art in hydraulic fracture diagnostics[J].SPE 64434,2000.
[2]李志明,张金珠.地应力与油气勘探开发[M].北京:石油工业出版社,1997.
[3]张景和,孙宗颀.地应力与裂缝测试技术在石油勘探开发中的应用[M].北京:石油工业出版社,2001.
[4]马建海,孙建孟.用测井资料计算地层应力[J].测井技术,2002,26(4):347~351.
[5]李正文,赵志超.地震勘探资料解释[M].北京:地质出版社,1988.
[6]崔荣旺.微地震压裂监测应在井中进行[J].大庆石油地质与开发,2007,26(4):138~142.
[7]Cipolla C L,Wright C A.State-of-the-art in hydraulic fracture diagnostics[J].SPE 64434,2000.
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