安岳~简阳地区须家河组沉积相及储层特征研究
发布时间：2018-10-25 09:01
【摘要】：本论文选取安岳-简阳地区须家河组沉积相及储层特征为研究对象,根据地表露头剖面、岩心、钻井资料、测井资料,结合测试分析成果,以沉积学、储层地质学和石油地质学理论为指导,对安岳-简阳地区须家河组地层、沉积相及储层特征进行了详细深入的研究,取得了如下研究成果和认识:1、须家河组至下向上分为6段,分别为须一~须六段。在地层划分、对比的基础上,系统研究了研究区须家河组及各段地层平面分布特征。2、在沉积微相识别标志研究基础上,将安岳-简阳地区须家河组划分为辫状河三角洲和湖泊沉积体系。其中,三角洲沉积进一步识别出辫状河三角洲前缘和前三角洲岩相,湖泊沉积划分为滨湖、浅湖亚相。在单井及井间沉积相对比研究基础上,对安岳-简阳地区须家河组各段沉积相平面展布特征做了系统研究,研究表明:研究区储层段(须二段、须四段、须六段)均为辫状河三角洲前缘亚相,具有由南至北的展布特征。3、对安岳-简阳地区须家河组钻井岩心观察及普通薄片及铸体薄片观察、鉴定基础上,系统研究了须家河组储层段储层岩性特征及孔隙结构特征。研究区储层段岩性以长石岩屑砂岩、岩屑长石砂岩为主,部分为岩屑砂岩。研究区须家河组储层的孔隙类型可分为原生粒间孔隙、粒间溶蚀孔隙、杂基内微孔隙、粒内溶蚀孔隙、裂缝五类,有储集意义的主要是原生粒间孔隙和粒间溶蚀孔隙。喉道类型有缩颈型喉道、点状喉道、片状喉道、弯片状喉道、管束状喉道。4、根据安岳-简阳地区须家河组岩心物性分析资料,研究区须家河组属特低孔、特低渗储层。储层类型以孔隙型储层为主,并发育有裂缝-孔隙型储层。5、应用Q型逐步聚类分析方法进行了储层分类,在考虑孔隙度、渗透率、参数范围的基础上,结合孔隙结构参数特征进行综合储层分类。共划分出四个类别的储层,其中Ⅰ类储层为好储层,Ⅱ类为较好储层,Ⅲ类为中等储层,而Ⅳ类为差储层。其中,研究区须家河组以Ⅲ类储层为主,Ⅱ类储层仅零星分布,Ⅰ类储层极少。6、以上述储层评价标准为标准,在对研究区单井储层划分及储层垂向演化特征研究基础上,编制了须家河组须二段、须四段及须六段储层孔隙度及储层厚度平面分布图,系统研究了各储层段平面分布规律。
[Abstract]:In this paper, the sedimentary facies and reservoir characteristics of Xujiahe formation in Anyue-Jianyang area are selected as the research objects. Based on the outcrop profile, core, drilling data and logging data, combined with the results of test and analysis, sedimentology is studied. Under the guidance of reservoir geology and petroleum geology theory, the formation, sedimentary facies and reservoir characteristics of Xujiahe formation in Anyue-Jianyang area are studied in detail and deeply. The following research results and understandings are obtained: 1. The Xujiahe formation is divided into 6 sections from the bottom to the bottom. It is one to six paragraphs respectively. On the basis of stratigraphic division and correlation, the stratigraphic distribution characteristics of Xujiahe formation and its sections in the study area are systematically studied. The Xujiahe formation in Anyue-Jianyang area is divided into braided river delta and lacustrine sedimentary system. Among them, the delta sediments further identify the braided river delta front and pre-delta lithofacies, and the lacustrine deposits are divided into littoral and shallow lacustrine subfacies. Based on the comparative study of single well and interwell sedimentary facies, the distribution characteristics of sedimentary facies in Xujiahe formation of Anyue Jianyang area are systematically studied. ) are braided river delta front subfacies with the characteristics of spreading from south to north. 3. On the basis of the observation of drilling core and ordinary and cast thin sections of Xujiahe formation in Anyue-Jianyang area, The lithologic characteristics and pore structure characteristics of Xujiahe formation reservoir are systematically studied. The lithology of the reservoir in the study area is mainly composed of feldspathic sandstone, lithic feldspathic sandstone and partly lithic sandstone. The pore types of Xujiahe formation reservoir in the study area can be divided into primary intergranular pore, intergranular dissolution pore, intergranular micropore, intragranular dissolution pore and fracture. The main reservoir significance is primary intergranular pore and intergranular dissolution pore. The throat types include neck-necked throat, point throat, flaky throat, curved flaky throat and tubular bundle throat. 4According to the physical property analysis data of Xujiahe formation in Anyue and Jianyang area, the Xujiahe formation belongs to very low porosity and very low permeability reservoir. The reservoir type is mainly pore type reservoir, and there are fractures and pore type reservoirs. 5. The reservoir classification is carried out by using the method of Q type gradual clustering analysis, on the basis of considering porosity, permeability and parameter range, Combined with pore structure parameters, comprehensive reservoir classification is carried out. There are four types of reservoirs, one of which is good reservoir, the second is better reservoir, the third is middle reservoir, and the fourth is poor reservoir. Among them, the Xujiahe formation in the study area is mainly composed of type 鈪，
本文编号：2293237
[Abstract]:In this paper, the sedimentary facies and reservoir characteristics of Xujiahe formation in Anyue-Jianyang area are selected as the research objects. Based on the outcrop profile, core, drilling data and logging data, combined with the results of test and analysis, sedimentology is studied. Under the guidance of reservoir geology and petroleum geology theory, the formation, sedimentary facies and reservoir characteristics of Xujiahe formation in Anyue-Jianyang area are studied in detail and deeply. The following research results and understandings are obtained: 1. The Xujiahe formation is divided into 6 sections from the bottom to the bottom. It is one to six paragraphs respectively. On the basis of stratigraphic division and correlation, the stratigraphic distribution characteristics of Xujiahe formation and its sections in the study area are systematically studied. The Xujiahe formation in Anyue-Jianyang area is divided into braided river delta and lacustrine sedimentary system. Among them, the delta sediments further identify the braided river delta front and pre-delta lithofacies, and the lacustrine deposits are divided into littoral and shallow lacustrine subfacies. Based on the comparative study of single well and interwell sedimentary facies, the distribution characteristics of sedimentary facies in Xujiahe formation of Anyue Jianyang area are systematically studied. ) are braided river delta front subfacies with the characteristics of spreading from south to north. 3. On the basis of the observation of drilling core and ordinary and cast thin sections of Xujiahe formation in Anyue-Jianyang area, The lithologic characteristics and pore structure characteristics of Xujiahe formation reservoir are systematically studied. The lithology of the reservoir in the study area is mainly composed of feldspathic sandstone, lithic feldspathic sandstone and partly lithic sandstone. The pore types of Xujiahe formation reservoir in the study area can be divided into primary intergranular pore, intergranular dissolution pore, intergranular micropore, intragranular dissolution pore and fracture. The main reservoir significance is primary intergranular pore and intergranular dissolution pore. The throat types include neck-necked throat, point throat, flaky throat, curved flaky throat and tubular bundle throat. 4According to the physical property analysis data of Xujiahe formation in Anyue and Jianyang area, the Xujiahe formation belongs to very low porosity and very low permeability reservoir. The reservoir type is mainly pore type reservoir, and there are fractures and pore type reservoirs. 5. The reservoir classification is carried out by using the method of Q type gradual clustering analysis, on the basis of considering porosity, permeability and parameter range, Combined with pore structure parameters, comprehensive reservoir classification is carried out. There are four types of reservoirs, one of which is good reservoir, the second is better reservoir, the third is middle reservoir, and the fourth is poor reservoir. Among them, the Xujiahe formation in the study area is mainly composed of type 鈪，
本文编号：2293237
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