井约束变速成图预测复杂盐岩层位方法在克拉2气田的应用
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摘要
克拉2气田地表为山丘、冲沟及河流,地震资料录取和处理难度大;目的层以上为高陡地层,岩相、厚度变化大,盐层、石膏、软泥、高压水层发育;需要准确预测复杂地质层位深度以防漏、卡、溢、喷。用实例阐述了常规的邻井层位厚度对比法和地震剖面法预测新井层位的局限性及误差产生的原因,提出了依据新完钻井不断修正层速度构造成图预测复杂层位界面深度的方法。该方法的应用,提高了克拉2气田复杂地层预测的精度,推广到迪那2气田的应用中也取得了良好的效果,对于其他类似或大井距油气田的钻井地质设计和跟踪具有借鉴意义。
The surface of Kela 2 gas field is hills,stormed cracks and rivers;it's difficult to collect and process seismic data.Above the reservoir of interest is high and cliffy formation which has variable lithofacies and thickness,and has developed salt bed,gypsum,mud and hi-pressure aquifer.To prevent leak,check,overflow and blowout,it's necessary to predict geologic position depth accurately.We elaborate the limitation and error of adjacent well position depth correlation method and seismic profile method through examples,and present a method that uses structural diagrams to predict geologic position depth under complex structures.The application of the new method increased the accuracy in predicting complex geologic position depth of the Kela 2 gas field,achieving good results.The method can be for reference in instructing drilling geologic design and drilling trace on other comparable or wide spacing fields.
The surface of Kela 2 gas field is hills,stormed cracks and rivers;it's difficult to collect and process seismic data.Above the reservoir of interest is high and cliffy formation which has variable lithofacies and thickness,and has developed salt bed,gypsum,mud and hi-pressure aquifer.To prevent leak,check,overflow and blowout,it's necessary to predict geologic position depth accurately.We elaborate the limitation and error of adjacent well position depth correlation method and seismic profile method through examples,and present a method that uses structural diagrams to predict geologic position depth under complex structures.The application of the new method increased the accuracy in predicting complex geologic position depth of the Kela 2 gas field,achieving good results.The method can be for reference in instructing drilling geologic design and drilling trace on other comparable or wide spacing fields.
引文
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[2]王晓阳,张泳.塔河油田膏盐岩地层录井技术[J].录井工程,2006,17(增):12-15.
[3]尚锁贵.膏盐岩地层地质特征与录井技术[J].录井工程,2006,17(4):10-13.
[4]由宏君,张广垠.加强钻井跟踪研究,提高勘探开发整体效益[J].西部探矿工程,2005(2):73.
[5]孙广忠.工程地质与地质工程[M].北京:地震出版社,1993.
[6]张谊平,沈惠智,于泉.预测地层深度的一种方法[J].录井工程,1997,8(4):56-58.
[7]杨勋尧.四川天然气深井钻井主要工程地质问题及对策[J].钻采工艺,2004,27(2):1-3.
[8]冯许魁,张玮,温声明.地震综合解释技术在塔里木盆地中的应用[J].中国石油勘探,2001,6(3):21-27.
[9]温声明,杨德兴,王贵重,等.层速度替换建场法在高陡构造区的应用[J].石油地球物理勘探,2006,41(3):308-312.
[10]温声明,王贵重,程明华,等.南天山山前冲断带的构造样式及成因探讨[J].新疆地质,2006,24(1):24-29.
[11]吴超,李青,徐振平,等.变速成图技术在DN气田群的应用[J].天然气地球科学,2008,19(6):857-863.
[12]蔡刚,屈志毅.构造复杂地区地震资料速度和成图方法研究与应用[J].天然气地球科学,2005,16(2):246-249.
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