新疆中拐地区火成岩裂缝储集层录井功指数比值解释评价及流体识别方法
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摘要
准噶尔盆地西北缘中拐地区火成岩孔洞-裂缝型(统称为裂缝)储集层评价及流体识别一直是录井工程中的难题。为解决这一难题,借鉴功指数比值研究成果,在阐述综合录井工程参数功指数识别裂缝原理的基础上,将该参数用于中拐地区火成岩储集层裂缝识别及评价。首先,探索火成岩储集层油气显示段功指数比值与测井视声波、视密度及测井孔隙度的关系,研究表明其相关性较好,为此依据测井评价标准建立功指数比值物性评价标准;其次,采用功指数比值与录井含油性参数建立了功指数比值-气测显示厚度比图板,该图板区分油气层与非价值层效果较好,解释符合率达84.4%,对当地两口近期完钻井的解释评价结论亦与试油结果相符,较好地满足了该地区火成岩裂缝储集层解释评价要求。
Evaluation and fluid identification of igneous rock vuggyfractured reservoirs(collectively referred to as crack)in Zhongguai area of northwestern margin of Junggar Basin has been a problem in mud logging engineering.To solve this problem and refer to the study of the work index ratio,on the basis of elaborating the principle identifying fractures with the work index of comprehensive mud logging engineering,the authors applied the work index to identify and evaluate the fractures of igneous rock reservoirs in Zhongguai area.First,the relationship between the work index ratio of oil and gas show intervals in igneous rock reservoirs and apparent sonic,apparent density and porosity of wireline logging was explored,the research showed that the correlation was good,physical property evaluation criteria were established by work index ratio based on well logging evaluation criteria;secondly,the chart of work index ratio and the thickness ratio of gas logging showing was set up by using the work index ratio and mud logging oil bearing parameters,the interpretation coincidence of the chart distinguishing oil and gas layers and non-value area was up to 84.4%,the interpretation and evaluation conclusions of the recent two local wells are in line with oil test results,meeting the interpretation and evaluation requirements of igneous rock fractured reservoirs of Zhongguai area.
Evaluation and fluid identification of igneous rock vuggyfractured reservoirs(collectively referred to as crack)in Zhongguai area of northwestern margin of Junggar Basin has been a problem in mud logging engineering.To solve this problem and refer to the study of the work index ratio,on the basis of elaborating the principle identifying fractures with the work index of comprehensive mud logging engineering,the authors applied the work index to identify and evaluate the fractures of igneous rock reservoirs in Zhongguai area.First,the relationship between the work index ratio of oil and gas show intervals in igneous rock reservoirs and apparent sonic,apparent density and porosity of wireline logging was explored,the research showed that the correlation was good,physical property evaluation criteria were established by work index ratio based on well logging evaluation criteria;secondly,the chart of work index ratio and the thickness ratio of gas logging showing was set up by using the work index ratio and mud logging oil bearing parameters,the interpretation coincidence of the chart distinguishing oil and gas layers and non-value area was up to 84.4%,the interpretation and evaluation conclusions of the recent two local wells are in line with oil test results,meeting the interpretation and evaluation requirements of igneous rock fractured reservoirs of Zhongguai area.
引文
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[3]于海军,王延志,王朝阳.裂缝型储集层评价方法探讨[C]∥《第二届中国石油工业录井技术交流会论文集》编委会.第二届中国石油工业录井技术交流会论文集.青岛:中国石油大学出版社,2013:203-209.
[4]杨卫东,江波,胡道雄,等.利用气测曲线形态解释油气层方法研究[C]∥《第二届中国石油工业录井技术交流会论文集》编委会.第二届中国石油工业录井技术交流会论文集.青岛:中国石油大学出版社,2013:258-259.
[5]尚锁贵,孙新阳,翁春军.一种新的气测录井气体比率解释方法[J].录井工程,2005,16(4):24-26,43.
[6]陈建飞.冀东油田气测显示特征分析[J].石油勘探与开发,1999,26(2):49-50.
[7]石油地质勘探专业标准化委员会.SY/T 6285-2011油气储层评价方法[S].北京:石油工业出版社,2011.