沾化凹陷罗家地区古近系沙三下泥页岩储层形成与分布规律研究
详细信息    本馆镜像全文|  推荐本文 |  |   获取CNKI官网全文
摘要
随着常规油气资源逐渐减小,非常规油气的勘探开发显得日益重要,其中页岩油气勘探潜力巨大,有着广阔的勘探前景。沾化凹陷是济阳坳陷泥页岩油气藏最发育的地区之一,以生油为主,到目前为止,已有多口探井获得工业油流,但是对于泥页岩储层的形成规律研究很少,认识不足,缺乏有效的评价方法,因此有必要针对泥页岩岩石学特征、储集特征以及影响泥页岩储层发育的各种因素进行系统的研究,建立一套泥页岩储层的评价方法,对研究区内泥页岩储层分布的有利区域进行预测,从而指导下一步的研究工作及勘探目标评价。
     本文在岩芯、薄片以及扫描电镜观察的基础上,结合X-衍射,有机地化测试等各种分析化验资料,将研究区沙三下亚段泥页岩划分为4大类7种类型,分别为:纹层状粘结岩、纹层状泥灰岩、块状泥灰岩、纹层状灰质页岩、块状灰质泥岩、粉砂质泥岩、块状泥岩。研究区泥页岩储集空间主要有3种孔隙和4种裂缝,孔隙包括:有机质演化孔、重结晶晶间孔以及粘土矿物晶间孔;裂缝包括:构造裂缝、异常压力裂缝、矿物收缩裂缝、层间微裂缝。影响本区泥页岩储层发育的因素有四个,分别为:岩性和岩石矿物组成、有机质含量及赋存方式、构造作用以及成岩作用。岩性对泥页岩储层的影响很大,通过对不同岩性所发育的储集空间类型以及相对含量的分析,可以将本区泥页岩储层定性的分成三类,一类储层包括纹层状粘结岩、纹层状泥灰岩以及纹层状灰质页岩三种岩性;二类储层包括块状泥灰岩以及块状泥岩;三类储层包括块状灰质泥岩以及粉砂质泥岩两类。其中,构造裂缝密度与方解石含量呈正相关关系,矿物收缩缝主要集中于粘土矿物中,层间缝则主要发育在纹层状泥页岩中。研究区有机碳含量高,多位于1%-4%,有机质含量高,有利于裂缝的发育;有机质的赋存方式对油气的储集以及运移起到重要作用,本区泥页岩中有机质主要有三种赋存方式,分别为:A模式-连续的条带状、B模式-断续较连通的条带状以及C模式-孤立的短条带状。构造作用对于构造裂缝的形成影响巨大,通常距离断层越近,裂缝发育越密集。成岩作用对于储层起到一定的改造作用。本区泥页岩处于中成岩阶段A期,粘土矿物转化、成烃作用以及重结晶作用对泥页岩储层有较大影响。
     综合影响泥页岩储层发育的四大因素,对有利区进行预测。层序1低位体系域储集空间最为发育,是勘探的重点层段,其中纹层状粘结岩是最好的勘探目标。
The exploration and development of unconventional oil and gas resources arebecoming increasingly important with conventional oil and gas resources graduallydecreasing, in which shale oil and gas resources have broad prospects for explorationbecause of the huge potential. Zhanhua Sag is one of the most developed areas ofshale hydrocarbon reservoirs in Jiyang Depression, which mainly generates oil, and sofar several prospecting wells have produced commercial oil flow in Zhanhua Sag, butpeople have done very little research on the formation law of the shale reservoir andlack effective evaluation methods. So it is essential to study on shale petrologiccharacteristics, reservoir features in shale, and various factors that affect the shalereservoir. Then one method of evaluating shale reservoir should be established topredict favorable areas which can offer a great help for the further exploration andresearch.
     In the paper, on the basis of core observation, thin section identification, andscanning electron microscopic analyses, combined with a variety of laboratory datasuch as X-diffraction, organic geochemical testing and so on, the shale in the lowerthird member of Shahejie Formation in the study area should be divided into4majorcategories and7types, which are laminated bondstone, laminated marl, massive marl,laminated calcareous shale, massive calcareous mudstone, silty mudstone, andmassive mudstone. There are mainly there kinds of pores and four kinds of fracturesin the shale. Pores include organic matter pores, recrystallized intercrystal pores andclay mineral intercrystal pores; fractures involve structural fractures, abnormalpressure fractures, mineral shrinkage fratures and interlaminar fractures. The factorsthat affect the development of the shale reservoir consist of lithology and mineralcomposition, content and occurrence of organic matter, tectogenesis and diagenesis.Lithology has a significant influence on the shale reservoir. By the analysis ofreservoir space types and their relative content developed in different kinds oflithology, the shale reservoir can be qualitatively divided into there categories: thebest reservoir includes laminated bondstone, laminated marl and laminated calcareousshale; the second-best reservoir includes massive marl and massive mudstone; theworst reservoir includes massive calcareous mudstone and silty mudstone. Studies show that there is a positive correlation between the density of structural fractures andthe content of calcite; mineral shrinkage fratures mainly exist in the clay mineral;interlaminar fractures are dominately developed in the laminated shale. TOC of theshale in the study area is high, mostly1%-4%, which is beneficial to produce fractures.The occurrence of organic matter also plays an important role on the oil and gasreservoir and migration. There are three main occurrences, which include dence andlaterally continuous layers (mode A), sparse and laterally continuous layers (mode B),sparse and laterally discontinuous layers (mode C). Tectogenesis contributes a lot toproduce structural fractures. Generally the closer away from the fault, the moreintensively structural fractures develop. Diagenesis plays a certain role on improvingthe shale reservoir. The shale is in the middle diagenetic stage A, in which claymineral transformation, generation of hydrocarbon and recrystallization have a greaterimpact on the shale reservoir.
     Finally, the four factors that affect the shale reservoir are integrated to predictfavorable areas. The low-stand system tract in the sequence1is the best layer toexplore, in which the reservoir space is most developed and the lithology of laminatedbondstone is the best exploration target.
引文
Bowker K A. Barnett Shale gas production, Fort Worth Basin: Issues and discussion. AAPGBulletin,2007,91(4):523-533.
    Curtis J B. Fractured shale-gas systems. AAPG Bulletin,2002,86(11):1921-1938.
    Curtis, J.B..2002. Fractured shale-gas systems: American Association of Petroleum Geologist,Bulletin, v.86, p.1921–1938.
    Daniel J.K. Ross, R. Marc Bustin. The importance of shale composition and pore structure upongas storage potential of shale gas reservoirs. Marine and Petroleum Geology,2009:916–927.
    England. P,Molnar. P. Inferences of deviatoric stress inactively deforming belts from simplephysical models[J]. Phil.Trans. R.Soc. Land.A,1991,337:181-194.
    Littke R, Baker D.R., Leythaeuser D..1988. Microscopic and sedimentologic evidence for thegeneration and migration of hydrocarbons in Toarcian source rocks of different maturities.Org Geochem,13(1-3):549-559.
    Loucks R B., Ruppel S C. Mississippian Barnett Shale: Lithofacies and depositional setting of adeep-water shale-gas succession in the Fort Worth Basin, Texas. AAPG Bulletin,2007,91(4):579-601.
    Loucks, R.G.., Reed, R.M., Ruppel, S.C., Jarvie, D.M..2010.Morphology,genesis, and distributionof nanometer-scale pores in siliceous mudstones of the Mississippian Barnett Shale. Journalof Sedimentary Research, v.80, p.919–932.
    Macquaker, J.S., Keller, M.A., Davis, S.J..2010. Algal blooms and “Marine Snow”: Mechanismsthat enhance preservation of organic carbon in ancient fine-granic sediments. Journal ofSedimentary Research, v.80, P.934–942.
    Montgomery S L, Jarvie D M, Bowker K A, et al. Mississippian Barnett Shale, Fort Worth Basin,north-central Texas: Gas-shale play with multitrillion cubic foot potential. AAPG Bulletin,2005,89(2):155-175.
    Richardson. R. M, Solomon. S. C, sleep. N. H. Tectonic stress in the plates. Reviews ofGeophysics and space physics,1979,17(5).
    Schmoker J W. Determination of organic-matter content of Appalachian Devonian shales fromgamma ray logs. AAPG Bulletin,1981,65(7):1285-1298.
    Watts. A. B,Bodine. J. H,Steckler, M. S. Observation of flexure and the state of stress in theoceanic lithosphere. J. Geophys. Res,1980,85(B11):6369-6376.
    安丰全,李从信.利用测井资料进行裂缝的定量识别.石油物探,1998,9.
    安丰全.利用测井资料进行裂缝的定量识别.石油物探,1998,37(3):119-123.
    陈荷立.山东东营凹陷泥岩压实作用及油气初次运移问题探讨.石油学报1983,49(2):9-21.
    慈兴华,刘宗林,王志战.罗家地区泥质岩裂缝型储集层综合研究.录井工程,2006,17(1):72-73.
    邓宏文,钱凯.深湖相泥岩的成因类型和组合演化.沉积学报,1990,8(3):1-6.
    丁文龙,张博闻,李泰明.古龙凹陷泥岩非构造裂缝的形成.石油与天然气地质,2003,24(1):51-53.
    丁中一,钱祥麟,霍红等.构造裂缝定量预测的一种新方法─二元法.地学前缘,1995,2(2):1-7.
    董冬,杨申镳,项希勇,等.济阳坳陷的泥质岩类油气藏.石油勘探与开发,1993,20(6):15-22.
    杜栩,郑洪印,焦秀琼.异常压力与油气分布.地学前缘,1995,2(4):137-148.
    付广,孟庆芬.松辽盆地北部异常高压在油气成藏与保存中的作用.油气地质与采收率,2003,10(1):23-25.
    郭瑾.东营凹陷利津洼陷泥岩裂缝气藏成藏条件.石油天然气学报,2009,10,31(5).
    何伟钢,金奎励,郝多虎,等.济阳坳陷郭7井沙河街组三段泥岩生、储油特性及其意义.石油与天然气地质,2003,24(4):375-378.
    胡春燕,刘立.1998.高频湖相沉积节律研究的新进展.世界地质,17(2):14-17.
    黄龙威.东濮凹陷文留中央地垒带泥岩裂缝性油气藏研究.石油天然气学报,2005,27(3):289-293.
    季玉新,王秀玲,曲寿利,等.罗家泥岩裂缝检测方法研究的进展.石油地球物理勘探,2004,39(4):428-432.
    贾承造.中国塔里木盆地构造特征与油气.北京:石油工业出版社,1997
    姜在兴.沉积学(第二版).北京:石油工业出版社,2010:303-305.
    解习农,王其允,李思田.沉积盆地泥质岩石的水力破裂与幕式压实作用.科学通报,1997,42(20):2193-2195.
    赖生华,刘文碧,李德发,等.泥质岩裂隙缝油藏特征及控制裂缝发育的因素.矿物岩石,1998,18(2):47-51.
    李德同,文世鹏.储集层构造裂缝的定量描述和预测方法.石油大学学报,1996,20(4):6-10.
    李捷,王海云,等.松辽盆地古龙凹陷青山口组泥岩异常高压与裂缝的关系.长春地质学院学报,1996,26(2):139-142.
    李捷,王海云,张文宾,等.松辽盆地古龙凹陷青山口组泥岩裂缝成因分析.世界地质,1995,14(3):52-55.
    李理,戴俊生.埕岛地区中生界和古生界构造应力场数值模拟及裂缝分析.石油大学学报,2000,24(1):6-9.
    李素梅,庞雄奇,刘可禹,等.2006.东营凹陷原油、储层吸附烃全扫描荧光特征与应用.地质学报,80(3):439-445.
    李伟,冷济高,宋东勇.文留地区盐间泥岩裂缝油气藏成藏作用.油气地质与采收率,2006,13(3):31-34.
    李新景,吕宗刚,董大忠,等.北美页岩气资源形成的地质条件.天然气工业,2009,29(5):27-32.
    李勇,钟建华,温志锋,等.济阳坳陷泥质岩油气藏类型及分布特征.地质科学,2006,41(4):586-600.
    李志明,张金珠.地应力与油气勘探开发.北京:石油工业出版社,1997
    李忠春,赵存桂,魏彩茹,等.构造裂缝的分布评价方法,青海石油,2000,18(1):8-16.
    刘传联,舒小辛,刘志伟.2001.济阳坳陷下第三系湖相生油岩的微观特征.沉积学报,19(2):293-297.
    刘传联,徐金鲤.2000.济阳坳陷下第三系颗石藻类化石的分布及与油气的关系.海洋地质与第四纪地质,20(3):73-76.
    刘庆,张林晔,沈忠民,等.2004.东营凹陷富有机质烃源岩顺层微裂隙的发育与油气运移.地质论评,50(6):593-599.
    慕小水,苑晓荣,贾贻芳,等.东濮凹陷泥岩裂缝油气藏形成条件及分布特点.断块油气田,2003,10(1):73-84.
    聂海宽,唐玄,边瑞康,等.页岩气成藏控制因素及中国南方页岩气发育有利区预测.石油学报,2009,30(4):484-490.
    秦启荣,张烈辉,邓辉等.古构造应力量值确定及其在构造地质建模中的应用.石油学报,2004,18(1):23-27.
    沈淑敏.构造应力驱动与油气运移.北京:地震出版社,1998
    苏朝光.罗西地区泥岩裂缝油气藏地震识别与描述.胜利物探新技术优秀论文集—隐蔽岩性油气藏地震解释技术专集,1999.
    苏晓捷.辽河断陷盆地泥岩裂缝油气藏研究.特种油气藏,2003,10(5):20-26.
    孙建孟,李召成.应用自然伽马能谱测井确定粘土矿物类型和含量.石油大学学报:自然科学版,1999,3(4):29-32.
    谭廷栋.裂缝性油气藏测井解释模型与评价方法.石油工业出版社,1987.
    万天丰.古构造应力场.北京:地质出版社,1988
    王慧中,梅洪明.1998.东营凹陷沙三下亚段油页岩中古湖泊学信息.同济大学学报,26(3):315-318.
    王连捷,王薇,张利容等.地应力驱动油气运移基本方程及有限元模拟.地质力学学报,1999,5(1):27-32.
    王平.地质力学方法研究不同构造力作用下地应力的类型和分布.石油学报,1992,13(1):3-1l.
    王峭梅,荆玲,赵泳,等.文留地区泥岩裂缝油气地球化学特征分析.断块油气田,2007,14(4):3-6.
    王喜双,李晋超,王绍民等.塔里木盆地构造应力场与油气聚集.石油学报,1997,18(1):23-27.
    王志刚.沾化凹陷裂缝性泥质岩油藏研究.石油勘探与开发,2003,30(1):41-43.
    吴巧生,王华,吴冲龙.沉积盆地构造应力场研究综述.地质科学情报,1998,17(1):8-12.
    徐思煌,梅廉夫,袁彩萍,等.裂缝储层岩心检测技术及应用.地质科技情报,17(20):65-70.
    姚益民,梁鸿德,蔡治国,等.中国油气区第三系(Ⅳ):渤海湾盆地油气区分册.北京:石油工业出版社,1994:102-152.
    尹克敏,李勇,慈兴华,等.罗家地区沙三段泥质岩裂缝特征研究.断块油气田,2002,9(5):24-26.
    袁静.沾化凹陷罗家地区沙四段顶部至沙三段泥质岩裂缝特征及其影响因素.石油大学学报,2003,27(4):20-22.
    张光亚等.南阳凹陷泥岩裂缝油气藏特征及其形成机制探讨.石油勘探与开发,1993,20(l):18-25
    张金川,薛会,张德明,等.页岩气及其成藏机理.现代地质,2003,17(4):466-466.
    张金功,王定一,邸世祥,等.异常高压带内开启泥岩裂隙的分布与油气初次运移.石油与天然气地质,1996,17(1):27-31.
    张金功,袁政文.泥质岩裂缝油气藏的成藏条件及资源潜力.石油与天然气地质,2002,23(4):336-338.
    张林晔,孔祥星,张春荣,等.济阳坳陷下第三系优质烃源岩的发育及其意义.地球化学,2003,32(1):35-42.
    张林晔.“富集有机质”成烃作用再认识:以东营凹陷为例.地球化学,2005,34(6):620-624.
    郑浚茂,庞明.碎屑储集岩的成岩作用研究.武汉:中国地质大学出版社,1989,69-117.
    朱光有,金强,张水昌,等.东营凹陷沙河街组湖相烃源岩组合特征.地质学报,78(3):416-427.

© 2004-2018 中国地质图书馆版权所有 京ICP备05064691号 京公网安备11010802017129号

地址:北京市海淀区学院路29号 邮编:100083

电话:办公室:(+86 10)66554848;文献借阅、咨询服务、科技查新:66554700