基于测井解释的碎屑岩储层成岩作用定量表征:以Q油田下干柴沟组下段为例
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摘要
针对Q油田下干柴沟组下段的储层物性和含油性在横向上差异较大的特点,采用钻井取心、岩石薄片等资料对工区储层成岩作用类型及特征进行了定性分析,研究认为工区目的层储层物性横向变化主要由胶结作用和溶解作用共同控制。在此基础上,根据胶结作用、溶解作用的测井响应特征,选取经归一化处理后的GR、SP测井曲线,建立了成岩作用强度定量表征模型,并将各种成岩作用对储层物性综合效应定义为成岩系数。依据成岩系数的大小,将研究区目的层段储层划分为强胶结弱溶解相、中等胶结弱溶解相、中等溶解弱胶结相和强溶解弱胶结相4种类型,定量识别了研究区优质储层,确定了目的层优质储层的平面分布。最后,分析了储层产能和成岩系数之间的关系,验证了该定量表征模型的有效性和实用性。
Reservoir diagenesis types and characteristics are analyzed qualitatively based on the information about drilling cores and petrographic thin sections,in allusion to the characteristics of wide difference of physical property and quality on the lower segment of Ganchaigou Formation lateral reservoir in Q Oilfield.It is concluded that the compaction causes the loss of primary pores,and the cementation of clay minerals,leading to the poor reservoir properties.They are the predominant reasons for the destruction of reservoir quality.On the contrary,dissolution is the most important factor for improving the reservoir quality in the study area.Generally,the change of physical property on lateral reservoir is controlled by cementation and dissolution collectively.Based on the log response characteristics of cementation and dissolution,GR and SP logs which have been normalized are chosen to establish the quantitative characterization model of diagenesis.Meanwhile,the combined effect on reservoir property from various diagenesis is defined as diagenesis coefficient.The reservoir of the lower segment of Ganchaigou Formation can be divided into four types of diagentic facies:intensively cemented and slight corroded facies,middle cemented and slight corroded facies,middle corroded and slight cemented facies,intensively corroded and slight cemented facies.According to the diagenesis coefficient the planar distribution of high-quality reservoir in objective interval is determined.Finally,the analysis of correlational relationship between reservoir capacity and diagenetic coefficient confirms the validity and practicality of the quantitative characterization model.
Reservoir diagenesis types and characteristics are analyzed qualitatively based on the information about drilling cores and petrographic thin sections,in allusion to the characteristics of wide difference of physical property and quality on the lower segment of Ganchaigou Formation lateral reservoir in Q Oilfield.It is concluded that the compaction causes the loss of primary pores,and the cementation of clay minerals,leading to the poor reservoir properties.They are the predominant reasons for the destruction of reservoir quality.On the contrary,dissolution is the most important factor for improving the reservoir quality in the study area.Generally,the change of physical property on lateral reservoir is controlled by cementation and dissolution collectively.Based on the log response characteristics of cementation and dissolution,GR and SP logs which have been normalized are chosen to establish the quantitative characterization model of diagenesis.Meanwhile,the combined effect on reservoir property from various diagenesis is defined as diagenesis coefficient.The reservoir of the lower segment of Ganchaigou Formation can be divided into four types of diagentic facies:intensively cemented and slight corroded facies,middle cemented and slight corroded facies,middle corroded and slight cemented facies,intensively corroded and slight cemented facies.According to the diagenesis coefficient the planar distribution of high-quality reservoir in objective interval is determined.Finally,the analysis of correlational relationship between reservoir capacity and diagenetic coefficient confirms the validity and practicality of the quantitative characterization model.
引文
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[21]程启贵,张磊,郑海妮,等.基于成岩作用定量表征的成岩储集相分类及意义:以鄂尔多斯盆地王窑杏河侯市地区延长组长6油层组特低渗储层为例[J].石油天然气学报,2010,32(5):60-65,401.
[2]樊爱萍,杨仁超,李义军.成岩作用研究进展与发展方向[J].特种油气藏,2009,16(2):1-8,103.
[3]赵国祥,王清斌,金小燕,等.渤海海域渤中凹陷奥陶系碳酸盐岩成岩作用[J].地质科技情报,2015,34(5):1-7.
[4]王健,操应长,高永进,等.东营凹陷古近系红层储层成岩作用特征及形成机制[J].石油学报,2013,34(2):283-292.
[5]王瑞飞,沈平平,赵良金.深层储集层成岩作用及孔隙度演化定量模型:以东濮凹陷文东油田沙三段储集层为例[J].石油勘探与开发,2011,38(5):552-559.
[6]杨仁超,王秀平,樊爱萍,等.苏里格气田东二区砂岩成岩作用与致密储层成因[J].沉积学报,2012,30(1):111-119.
[7]汪新光,张磊,赛理麦,等.涠洲A油田流三段扇三角洲储层成岩作用与孔隙演化[J].地质科技情报,2016,35(5):59-65.
[8]刘伟,窦齐丰,黄述旺,等.成岩作用的定量表征与成岩储集相研究:以科尔沁油田交2断块区九佛堂组(J3jf)下段为例[J].中国矿业大学学报,2002,31(5):62-66.
[9]王旭影,吴胜和,岳大力,等.基于定量成岩作用分析的成岩储集相研究:以老君庙油田古近系M油组为例[J].西安石油大学学报:自然科学版,2015,30(6):10-16,6.
[10]宋子齐,王静,路向伟,等.特低渗透油气藏成岩储集相的定量评价方法[J].油气地质与采收率,2006,13(2):21-23,104.
[11]窦齐丰,黄述旺,王韶华.红柳泉岩性油藏低渗透储集层分类评价[J].石油勘探与开发,2002,29(1):87-89.
[12]孙秀建,刘应如,乐幸福,等.柴达木盆地红柳泉地区岩性油藏主控因素分析[J].天然气地球科学,2010,21(5):801-808.
[13]Salem A M,Morad S,Mato L F,et al.Diagenesis and reservoirquality evolution of fluvial sandstones during progressive burial and uplift:Evidence from the Upper Jurassic Boipeba Member,Reconcavo Basin,Northeastern Brazil[J].AAPG Bulletin,2000,84(7):1015-1040.
[14]Ceriani A,Giulio A D,Goldstein R H,et al.Diagenesis associated with cooling du-ring burial:An example from Lower Cretaccous reservoir sandstones[J].AAPG Bulletin,2002,86(9):1573-1591.
[15]张顺存,仲伟军,梁则亮,等.准噶尔盆地车拐地区侏罗系八道湾组储层成岩作用特征分析[J].岩性油气藏,2011,23(5):49-55.
[16]牟中海,马力宁,马达德,等.柴达木盆地红柳泉构造下干柴沟组下段岩性油藏主控因素[J].中国石油勘探,2014,19(6):24-32.
[17]丁圣,钟思瑛,高国强,等.测井地质结合定量评价低渗透储层成岩相[J].西南石油大学学报:自然科学版,2012,34(4):83-87.
[18]李淼,蒲春生,景成,等.GY油田储层成岩储集相分类及测井响应特征[J].岩性油气藏,2013,25(3):49-51.
[19]徐继明.超低渗储层成岩作用定量表征方法及应用[D].北京:中国地质大学(北京),2014.
[20]孙思敏.低渗透储层成岩作用定量表征与成岩储集相:以吉林新立油田泉头组三、四段为例[J].沉积与特提斯地质,2007,27(2):100-105.
[21]程启贵,张磊,郑海妮,等.基于成岩作用定量表征的成岩储集相分类及意义:以鄂尔多斯盆地王窑杏河侯市地区延长组长6油层组特低渗储层为例[J].石油天然气学报,2010,32(5):60-65,401.