板桥-合水地区长8_1储层不同类型成岩相孔隙结构特征及生产动态分析
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摘要
通过铸体薄片、扫描电镜和X衍射等方法将板桥-合水地区长8_1储层成岩相划分为6类,并应用压汞及油水相渗等实验系统地分析了不同类型成岩相孔隙结构及渗流机理,在此基础上,结合实际生产资料,对各类成岩相的生产动态特征进行了分析。结果表明:长石溶蚀-残余粒间孔相为优势成岩相,其储集空间发育,孔喉比小且连通性好,油水之间流动干扰弱,初期日产油量较高,低含水期稳产周期长,注水开发效果好;而劣势成岩相,如水云母胶结相,尽管孔隙也发育,但孔喉比大且连通性差,导致储层渗流能力差,含水率上升快且稳产期短,注水开发效果差,建议对其采取适当措施降低储层非均质性或者调整开发方案,从而提高最终采收率。
In this paper,the diagenetic facies of Chang 81 reservoirs are divided intosix types according to the characteristics of sedimentary features,diagenetic minerals,interstitial matter and pore type.The micro-pore structure and seepage characteristics of diagenetic facies of different types are systematically analyzed by means of casting thin films,SEM,X-ray diffraction,mercury intrusion and oil-water infiltration experiments.The dynamic characteristics of different diagenetic facies are analyzedbased on the analysis of different diagenetic facies actual production data and micro-pore structure.The results show that feldspar dissolution-residual intergranular pore phase is dominant diagenetic facies,andthe formation of pore space is well developed with goodpore throat sorting and connectivity.The flow disturbance between oil and water is weak,and the daily oil production is high,but the water content is low and the stable production period is long.The water injection development effect is good.Although the pore space of the disadvantage diagenetic facies is also developed,like the hydromica cementation phase,the poor pore throat separation and connectivity rerult in poor reservoir seepage capacity,quick increase of water contentand short period of stable production.And water injection development is poor.It is recommended that appropriate measures should be taken to reduce reservoir homogeneity or adjustment of development programs to improve final recovery.
In this paper,the diagenetic facies of Chang 81 reservoirs are divided intosix types according to the characteristics of sedimentary features,diagenetic minerals,interstitial matter and pore type.The micro-pore structure and seepage characteristics of diagenetic facies of different types are systematically analyzed by means of casting thin films,SEM,X-ray diffraction,mercury intrusion and oil-water infiltration experiments.The dynamic characteristics of different diagenetic facies are analyzedbased on the analysis of different diagenetic facies actual production data and micro-pore structure.The results show that feldspar dissolution-residual intergranular pore phase is dominant diagenetic facies,andthe formation of pore space is well developed with goodpore throat sorting and connectivity.The flow disturbance between oil and water is weak,and the daily oil production is high,but the water content is low and the stable production period is long.The water injection development effect is good.Although the pore space of the disadvantage diagenetic facies is also developed,like the hydromica cementation phase,the poor pore throat separation and connectivity rerult in poor reservoir seepage capacity,quick increase of water contentand short period of stable production.And water injection development is poor.It is recommended that appropriate measures should be taken to reduce reservoir homogeneity or adjustment of development programs to improve final recovery.
引文
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[12]刘金库,彭军,刘建军,等.绿泥石环边胶结物对致密砂岩孔隙的保存机制:以川中-川南过渡带包界地区须家河组储层为例[J].石油与天然气地质,2009,30(1):53-58.
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[16]任大忠,孙卫,魏虎,等.华庆油田长81砂岩储层成岩相特征[J].地质科技情报,2014,33(2):72-79.
[17]师调调,孙卫,何生平,等.华庆地区延长组长6储层不同类型成岩相微观孔隙结构特征及生产动态分析[J].兰州大学学报:自然科学版,2012,48(3):7-13.
[18]时建超,孙卫,卢德根,等.白豹地区延长组长81储层成岩作用与成岩相研究[J].地质科技情报,2013,33(4):31-37.
[19]王伟,朱玉双,陈大友,等.低渗透油藏微观渗流特征及影响因素研究:以鄂尔多斯盆地姬塬地区长6油层组为例[J].地质科技情报,2015,34(2):159-164.
[20]张茜,孙卫,明红霞,等.板桥-合水地区长63储层成岩相孔隙结构特征及优质储层分布[J].沉积学报,2016,34(2):336-345.
[21]肖开华,冯动军,李秀鹏.川西新场须四段致密砂岩储层微观孔喉与可动流体变化特征[J].石油实验地质,2014,36(1):77-82.
[22]魏虎,孙卫,屈乐,等.靖边气田北部上古生界储层微观孔隙结构及其对生产动态影响[J].地质科技情报,2011,30(2):85-90.
[23]师调调.华庆地区长6储层微观孔隙结构及渗流特征研究[D].西安:西北大学,2012.
[2] Dutton S P,Diggs T N.Evolution of porosity and permeability in the Lower Cretaceous Travis Peak Formation,East Texas[J].AAPG Bulletin,1992,76(2):252-269.
[3]钟广法,邬宁芬.成岩岩相分析:一种全新的成岩非均质性研究方法[J].石油勘探与开发,1997,24(5):62-66.
[4]孙玉善,申银民,徐讯,等.应用成岩岩相分析法评价和预测非均质性储层及其含油性:以塔里木盆地哈得逊地区为例[J].沉积学报,2002,20(1):55-59.
[5]赖锦,王贵文,王书南,等.碎屑岩储层成岩相测井识别方法综述及研究进展[J].中南大学学报:自然科学版,2013,44(12):4942-4953.
[6]陈彦华,刘莺.成岩相:储集体预测的新途径[J].石油实验地质,1994,16(3):274-280.
[7]高辉,孙卫.鄂尔多斯盆地合水地区长8储层成岩作用与有利成岩相带[J].吉林大学学报:地球科学版,2010,40(3):542-548.
[8]高辉,孙卫,宋广寿,等.鄂尔多斯盆地合水地区长8储层特低渗透成因分析与评价[J].地质科技情报,2008,27(5):71-76.
[9]罗静兰,李忠兴,史成恩,等.鄂尔多斯盆地西南部上三叠统延长组长8、长6油层组的沉积体系与物源方向[J].地质通报,2008,27(1):101-111.
[10]魏斌,魏红红,陈全红,等.鄂尔多斯盆地上三叠统延长组物源分析[J].西北大学学报,2003,33(4):447-450.
[11]王华,柳益群,陈魏巍,等.鄂尔多斯盆地郑庄油区长6储层成岩作用及其对储层的影响[J].西安石油大学学报,2010,25(1):12-18.
[12]刘金库,彭军,刘建军,等.绿泥石环边胶结物对致密砂岩孔隙的保存机制:以川中-川南过渡带包界地区须家河组储层为例[J].石油与天然气地质,2009,30(1):53-58.
[13]黄思静,谢连文,张萌,等.中国三叠系陆相砂岩中自生绿泥石的形成机制及其与储层孔隙保存的关系[J].成都理工大学学报:自然科学版,2004,31(3):273-281.
[14]罗静兰,张晓莉,张云翔,等.成岩作用对河流-三角洲相砂岩储层物性演化的影响:以延长油区上三叠统延长组长2砂岩为例[J].沉积学报,2001,19(4):541-547.
[15]柳益群,李文厚.陕甘宁盆地东部上三叠统含油长石砂岩的成岩特点及孔隙演化[J].沉积学报,1996,14(3):87-96.
[16]任大忠,孙卫,魏虎,等.华庆油田长81砂岩储层成岩相特征[J].地质科技情报,2014,33(2):72-79.
[17]师调调,孙卫,何生平,等.华庆地区延长组长6储层不同类型成岩相微观孔隙结构特征及生产动态分析[J].兰州大学学报:自然科学版,2012,48(3):7-13.
[18]时建超,孙卫,卢德根,等.白豹地区延长组长81储层成岩作用与成岩相研究[J].地质科技情报,2013,33(4):31-37.
[19]王伟,朱玉双,陈大友,等.低渗透油藏微观渗流特征及影响因素研究:以鄂尔多斯盆地姬塬地区长6油层组为例[J].地质科技情报,2015,34(2):159-164.
[20]张茜,孙卫,明红霞,等.板桥-合水地区长63储层成岩相孔隙结构特征及优质储层分布[J].沉积学报,2016,34(2):336-345.
[21]肖开华,冯动军,李秀鹏.川西新场须四段致密砂岩储层微观孔喉与可动流体变化特征[J].石油实验地质,2014,36(1):77-82.
[22]魏虎,孙卫,屈乐,等.靖边气田北部上古生界储层微观孔隙结构及其对生产动态影响[J].地质科技情报,2011,30(2):85-90.
[23]师调调.华庆地区长6储层微观孔隙结构及渗流特征研究[D].西安:西北大学,2012.