本文主要研究内容
作者张鹏（2019）在《延长油区定边长7致密油微观孔隙结构及储层评价》一文中研究指出：鄂尔多斯盆地蕴藏丰富的致密油资源,主力层位为三叠系延长组长6、长7、长8、长9等油层组,相对而言长7的勘探开发较晚,油田动、静态数据较少,对长7致密油储集层各方面的分析研究相对薄弱,阻碍了油田的勘探开发进程以及开发效果。基于此本论文以鄂尔多斯盆地西北部定边地区三叠系延长组长7油层为例,在前人研究的基础之上,开展岩心观察、物性、粒度图像、铸体薄片、扫描电镜、X-衍射、CT扫描、高压压汞、恒速压汞、油水相渗、核磁共振、启动压力梯度、岩石力学等分析测试技术实验,综合研究定边长7致密砂岩储层沉积特征、岩石学特征、物性特征、微观孔隙结构、油水渗流特征、可动流体赋存特征等影响因素,在这些基础上确定了储层动用物性下限及储层主控因素,同时建立了储集层综合分类评价方法并进行了评价。取得了以下主要认识:（1）定边长7致密油研究区发育三角洲和湖泊相沉积,主要以三角洲前缘亚相水下分流河道、分流间湾微相为主,长7下部湖泥微相较发育。储层岩性以灰黑色、灰色、灰白色长石砂岩为主,其次为岩屑长石砂岩。孔隙类型主要发育长石溶孔和粒间孔,其次是岩屑溶孔,另有极少量晶间孔、微裂隙。同时喉道类型以片状、弯片状为主,管束状、缩颈喉道次之。（2）微观孔隙结构特征分析,依据高压压汞排驱压力及物性参数,将毛管压力曲线分为4类,Ⅰ类低排驱压力-微-微细喉道型、Ⅱ类低中排驱压力-微喉道型、Ⅲ类中排驱压力-微喉道型、Ⅳ类中高排驱压力-纳米吸附孔道型;依据恒速压汞毛管压力曲线与孔隙、喉道、总进汞饱和度的匹配关系,将曲线形态划分为孔隙区、孔喉过渡区、喉道区。当汞进入连通性差或不连通的孔道喉道时,毛管压力上升,进汞量主要受到喉道及微孔的制约,喉道区的进汞量大小决定了总孔喉进汞量,加强喉道的研究对致密油藏来说至关重要。综合运用经验统计法、饱和度与孔隙度关系法、最小流动孔喉半径法等手段确定了研究区致密储层的物性动用下限值,孔隙度为6.5%、渗透率为0.04×10-3μm2。（3）参照可动流体饱和度评价标准对储集层分类,以Ⅲ类储层为主,V类次之。T2截止值范围为1.70ms13.67ms,平均为5.78ms,可动流体饱和度低,平均为33.04%。离心前、后T2谱曲线形态都以双峰为主,离心后曲线形态主要分布在T2截止值左侧区间。（4）基于核磁共振理论,推导出了核磁共振T2值与孔喉半径的对应关系,取对数线性化,利用最小二乘法求解幂函数的常数项值,建立了核磁共振T2谱转化成孔喉半径的新方法;并通过延长致密油藏核磁共振数据与恒速压汞孔喉半径数据进行了验证,结果呈现较好的一致性,所建立的核磁共振研究致密储层微观孔隙结构方法的可行性和实用性较好。（5）根据油水相渗曲线形态特征将其划分为3种类型,分别为Ⅰ型Kro上凹-Krw下凹型、Ⅱ型Kro上凹-Krw直线型、Ⅲ型Kro-Krw上凹型。Ⅰ型相渗曲线最终驱油效率为48.44%,开发效果好;Ⅱ型相渗曲线最终驱油效率为43.19%,应加大无水期的研究力度,开发效果略好;Ⅲ型相渗曲线最终驱油效率为36.26%,开发效果差。（6）提出了致密油“八元综合分类系数”法,同时Ⅰ类储层Feci>8,Ⅱ类储层3<Feci≤8,Ⅲ类储层-2<Feci≤3,Ⅳ类储层Feci≤-2。并根据研究区域的实际数据对致密油藏储层评价方法进行了验证,结果可靠性较高,所建立的致密油储层评价方法具有一定的实用性。综合储集层“八元综合分类系数”定量分析控制区域与沉积相分布规律及控制特征定性分析共同作用绘制了Y区块的致密油储层综合分类评价图,主要以三类致密油储集层为主。
Abstract
e er duo si pen de wen cang feng fu de zhi mi you zi yuan ,zhu li ceng wei wei san die ji yan chang zu chang 6、chang 7、chang 8、chang 9deng you ceng zu ,xiang dui er yan chang 7de kan tan kai fa jiao wan ,you tian dong 、jing tai shu ju jiao shao ,dui chang 7zhi mi you chu ji ceng ge fang mian de fen xi yan jiu xiang dui bao ruo ,zu ai le you tian de kan tan kai fa jin cheng yi ji kai fa xiao guo 。ji yu ci ben lun wen yi e er duo si pen de xi bei bu ding bian de ou san die ji yan chang zu chang 7you ceng wei li ,zai qian ren yan jiu de ji chu zhi shang ,kai zhan yan xin guan cha 、wu xing 、li du tu xiang 、zhu ti bao pian 、sao miao dian jing 、X-yan she 、CTsao miao 、gao ya ya gong 、heng su ya gong 、you shui xiang shen 、he ci gong zhen 、qi dong ya li ti du 、yan dan li xue deng fen xi ce shi ji shu shi yan ,zeng ge yan jiu ding bian chang 7zhi mi sha yan chu ceng chen ji te zheng 、yan dan xue te zheng 、wu xing te zheng 、wei guan kong xi jie gou 、you shui shen liu te zheng 、ke dong liu ti fu cun te zheng deng ying xiang yin su ,zai zhe xie ji chu shang que ding le chu ceng dong yong wu xing xia xian ji chu ceng zhu kong yin su ,tong shi jian li le chu ji ceng zeng ge fen lei ping jia fang fa bing jin hang le ping jia 。qu de le yi xia zhu yao ren shi :（1）ding bian chang 7zhi mi you yan jiu ou fa yo san jiao zhou he hu bo xiang chen ji ,zhu yao yi san jiao zhou qian yuan ya xiang shui xia fen liu he dao 、fen liu jian wan wei xiang wei zhu ,chang 7xia bu hu ni wei xiang jiao fa yo 。chu ceng yan xing yi hui hei se 、hui se 、hui bai se chang dan sha yan wei zhu ,ji ci wei yan xie chang dan sha yan 。kong xi lei xing zhu yao fa yo chang dan rong kong he li jian kong ,ji ci shi yan xie rong kong ,ling you ji shao liang jing jian kong 、wei lie xi 。tong shi hou dao lei xing yi pian zhuang 、wan pian zhuang wei zhu ,guan shu zhuang 、su geng hou dao ci zhi 。（2）wei guan kong xi jie gou te zheng fen xi ,yi ju gao ya ya gong pai qu ya li ji wu xing can shu ,jiang mao guan ya li qu xian fen wei 4lei ,Ⅰlei di pai qu ya li -wei -wei xi hou dao xing 、Ⅱlei di zhong pai qu ya li -wei hou dao xing 、Ⅲlei zhong pai qu ya li -wei hou dao xing 、Ⅳlei zhong gao pai qu ya li -na mi xi fu kong dao xing ;yi ju heng su ya gong mao guan ya li qu xian yu kong xi 、hou dao 、zong jin gong bao he du de pi pei guan ji ,jiang qu xian xing tai hua fen wei kong xi ou 、kong hou guo du ou 、hou dao ou 。dang gong jin ru lian tong xing cha huo bu lian tong de kong dao hou dao shi ,mao guan ya li shang sheng ,jin gong liang zhu yao shou dao hou dao ji wei kong de zhi yao ,hou dao ou de jin gong liang da xiao jue ding le zong kong hou jin gong liang ,jia jiang hou dao de yan jiu dui zhi mi you cang lai shui zhi guan chong yao 。zeng ge yun yong jing yan tong ji fa 、bao he du yu kong xi du guan ji fa 、zui xiao liu dong kong hou ban jing fa deng shou duan que ding le yan jiu ou zhi mi chu ceng de wu xing dong yong xia xian zhi ,kong xi du wei 6.5%、shen tou lv wei 0.04×10-3μm2。（3）can zhao ke dong liu ti bao he du ping jia biao zhun dui chu ji ceng fen lei ,yi Ⅲlei chu ceng wei zhu ,Vlei ci zhi 。T2jie zhi zhi fan wei wei 1.70ms13.67ms,ping jun wei 5.78ms,ke dong liu ti bao he du di ,ping jun wei 33.04%。li xin qian 、hou T2pu qu xian xing tai dou yi shuang feng wei zhu ,li xin hou qu xian xing tai zhu yao fen bu zai T2jie zhi zhi zuo ce ou jian 。（4）ji yu he ci gong zhen li lun ,tui dao chu le he ci gong zhen T2zhi yu kong hou ban jing de dui ying guan ji ,qu dui shu xian xing hua ,li yong zui xiao er cheng fa qiu jie mi han shu de chang shu xiang zhi ,jian li le he ci gong zhen T2pu zhuai hua cheng kong hou ban jing de xin fang fa ;bing tong guo yan chang zhi mi you cang he ci gong zhen shu ju yu heng su ya gong kong hou ban jing shu ju jin hang le yan zheng ,jie guo cheng xian jiao hao de yi zhi xing ,suo jian li de he ci gong zhen yan jiu zhi mi chu ceng wei guan kong xi jie gou fang fa de ke hang xing he shi yong xing jiao hao 。（5）gen ju you shui xiang shen qu xian xing tai te zheng jiang ji hua fen wei 3chong lei xing ,fen bie wei Ⅰxing Kroshang ao -Krwxia ao xing 、Ⅱxing Kroshang ao -Krwzhi xian xing 、Ⅲxing Kro-Krwshang ao xing 。Ⅰxing xiang shen qu xian zui zhong qu you xiao lv wei 48.44%,kai fa xiao guo hao ;Ⅱxing xiang shen qu xian zui zhong qu you xiao lv wei 43.19%,ying jia da mo shui ji de yan jiu li du ,kai fa xiao guo lve hao ;Ⅲxing xiang shen qu xian zui zhong qu you xiao lv wei 36.26%,kai fa xiao guo cha 。（6）di chu le zhi mi you “ba yuan zeng ge fen lei ji shu ”fa ,tong shi Ⅰlei chu ceng Feci>8,Ⅱlei chu ceng 3<Feci≤8,Ⅲlei chu ceng -2<Feci≤3,Ⅳlei chu ceng Feci≤-2。bing gen ju yan jiu ou yu de shi ji shu ju dui zhi mi you cang chu ceng ping jia fang fa jin hang le yan zheng ,jie guo ke kao xing jiao gao ,suo jian li de zhi mi you chu ceng ping jia fang fa ju you yi ding de shi yong xing 。zeng ge chu ji ceng “ba yuan zeng ge fen lei ji shu ”ding liang fen xi kong zhi ou yu yu chen ji xiang fen bu gui lv ji kong zhi te zheng ding xing fen xi gong tong zuo yong hui zhi le You kuai de zhi mi you chu ceng zeng ge fen lei ping jia tu ,zhu yao yi san lei zhi mi you chu ji ceng wei zhu 。
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论文作者分别是来自西北大学的张鹏，发表于刊物西北大学2019-10-08论文，是一篇关于致密砂岩储层论文,微观孔隙结构论文,渗流特征论文,储层评价论文,定边地区论文,西北大学2019-10-08论文的文章。本文可供学术参考使用，各位学者可以免费参考阅读下载，文章观点不代表本站观点，资料来自西北大学2019-10-08论文网站，若本站收录的文献无意侵犯了您的著作版权，请联系我们删除。
标签：致密砂岩储层论文; 微观孔隙结构论文; 渗流特征论文; 储层评价论文; 定边地区论文; 西北大学2019-10-08论文;