碳酸盐岩洞穴充填物及其充填程度的测井判别方法
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摘要
近年来在新疆塔里木盆地发现了超亿吨级的碳酸盐岩大型油气田,洞穴型碳酸盐岩储层是其非常重要的储层类型之一,而此类储层的有效性取决于洞穴中充填物及充填程度,由于此储层中的洞穴横向变化可延伸至几米甚至几十米,远远超过了仪器的探测深度,因此对它的充填程度及其充填物的有效识别仍是目前待攻关的难题。通过分析不同充填程度、不同充填物的洞穴在常规测井曲线、电成像和阵列声波图像上的响应特征以及交会图分析法来识别洞穴充填物的性质,并结合钻井、录井、试井及地震等方面的识别标志,将洞穴型储层划分为完全充填洞穴储层、半充填以及未充填洞穴储层。
The large oil-gas oilfield,discovered in the Tarim Basin of Xinjiang,has more than 0.1 billion tons OOIP.Cave carbonate reservoir is one of very important reservoir types,the effectiveness of such reservoir depends on filling degree of cave,because of the reservoir's horizontal distance can extend to a few meters or even dozens of meters,far exceeding the depth of the detection equipment,so it is still a technical puzzle to recognize effectively the infill and the filling degree in karst cave.The ancient caves' logging response characteristic with different filling degree and filler in the conventional well logs,electric array acoustic imaging,array sonic image and cross-plot analysis to identify the character of the cave filling are analyzing in conjunction with identifier such as drilling,logging,well testing and seismic in the paper.It is concluded that the cave reservoirs can be divided into completely filled,half filled and unfilled types according to the analysis.
The large oil-gas oilfield,discovered in the Tarim Basin of Xinjiang,has more than 0.1 billion tons OOIP.Cave carbonate reservoir is one of very important reservoir types,the effectiveness of such reservoir depends on filling degree of cave,because of the reservoir's horizontal distance can extend to a few meters or even dozens of meters,far exceeding the depth of the detection equipment,so it is still a technical puzzle to recognize effectively the infill and the filling degree in karst cave.The ancient caves' logging response characteristic with different filling degree and filler in the conventional well logs,electric array acoustic imaging,array sonic image and cross-plot analysis to identify the character of the cave filling are analyzing in conjunction with identifier such as drilling,logging,well testing and seismic in the paper.It is concluded that the cave reservoirs can be divided into completely filled,half filled and unfilled types according to the analysis.
引文
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[3]王光付.碳酸盐岩溶洞型储层综合识别及预测方法[J].石油学报,2008,29(1):47-50.
[4]许维武,李国蓉,刘存革,等.塔河油田8区中下奥陶统洞穴型储层发育特征及控制因素[J].内蒙古石油化工,2008(3):116-119.
[5]杨国龙,鲁新便.塔里木塔河油田奥陶系碳酸盐岩古岩溶洞穴展布规律探讨[M].北京:石油工业出版社,2006:44-52.
[6]阎相宾.塔河油田下奥陶统古岩溶作用及储层特征[J].江汉石油学院学报,2002,24(4):22-26.
[7]伍文明,李海鹏,杨露,等.塔河油田4区鹰山组碳酸盐岩储层测井识别[J].中国西部油气地质,2007,3(1):74-78.
[8]吴欣松,潘文庆,顾乔元,等.塔里木盆地轮西地区古岩溶洞穴型储层分布规律[J].油气地质与采收率,2006,13(2):1-5.
[9]唐文榜,刘来祥,樊佳芳,等.溶洞充填物判识的频率差异分析技术[J].石油与天然气地质,2002,23(1):41-44.
[10]金强,王瑞平.潜山型碳酸盐岩储集空间成因模式[J].油气地质与采收率,2003,10(4):12-15.
[11]何宇彬,邹成杰.关于喀斯特洞穴发育深度问题[J].中国岩溶,1997,16(2):167-175.
[12]肖玉茹,何峰煜,孙义梅.古洞穴型碳酸盐岩储层特征研究[J].石油与天然气地质,2003,24(1):75-80.
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