四川盆地为湖相页岩气勘探开发的重点区域,除了对海相页岩气深入评价与研究,浅层陆相页岩气探索更应加快步伐,发掘盆地内有经济开发意义的陆相页岩气.通过全岩测试及地化特征分析,对普光地区中侏罗统自流井组大安寨段页岩气资源潜力进行研究.分析表明:普光地区自流井组大安寨段页岩发育较好,分布范围广,生烃及储集能力较好,具有比较好的页岩气勘探潜力.

为了探讨川东北普光地区中侏罗统千佛崖组千一段湖相页岩储层特征及其主控因素,开展了有机地球化学、矿物组成、孔隙结构参数等分析测试.研究表明:普光地区千一段④小层中发育黑色页岩段,具有较高的有机质丰度(总有机碳质量分数平均为1.46％),干酪根类型以Ⅱ1型为主,镜质组反射率介于1.9％～2.0％,达到高成熟阶段,黏土质量分数介于44.57％～62.24％,石英质量分数介于22.1％～38.6％;孔隙类型以有机质孔为主,比表面积和孔体积均值分别为7.88 m2/g和0.001 2cm3/g,孔隙度均值为4.54％,孔隙结构以锥形孔及四面开放的尖壁孔为主.分析相关性后发现,页岩比表面积和孔体积与总有机碳质量分数的相关性呈先下降后上升趋势,说明随着总有机碳质量分数增加,有机质孔成为页岩孔隙空间的主要贡献者,无机质孔对孔隙发育影响减弱.黏土矿物与充足有机质的混合输入是千一段优质储层形成的基础,中—高碳黏土质页岩是普光地区千—段湖相页岩的关键储集岩相.

The study is focuses on the Chang 8 formation in west area of Mahuangshan,Ordos Basin.The analysis is based on the data collated from cores,thin sections,casting thin sections,scanning electron microscopy (SEM) and mercury intrusions.In order to study the reservoirs' diagenetic facies,firstly,the type of diagenesis and its characteristics should be ascertained.Secondly,based on the combined porosity and permeability data,the Chang 8 formation was segregated into four types of diagenetic facies.Thirdly,based on the logging response characteristics of the diagenesis,the logging identification standard of the diagenetic facies was established and used in the diagenetic facies identification of the wells.Finally,based on the results of the above study,the distribution of diagenetic facies between wells can be predicted,and the development regularities of the diagenetic facies summarized.From the study,the diagenetic facies of the Chang 8 formation in the west of Mahuangshan area can be divided into four types,which are porphyritic corroded porosity diagenetic facies,carbonate cemented tight diagenetic facies,clay minerals cemented tight diagenetic facies and compacted tight diagenetic facies.The porphyritic corroded porosity diagenetic facies mainly developed in an underwater distributary channel microfacies,possessing the most excellent properties such as,transverse ductility and connectivity.Carbonate cemented tight diagenetic facies and clay minerals cemented tight diagenetic facies mainly developed in an underwater distributary channel,sheet sand,debouch bar microfacies,possessing the second physical property.Compacted tight diagenetic facies mainly developed in a distributary bay microfacies and pre-delta mud microfacies,possessing the third physical properties also with continuous development characteristics,which happens to be the most well developed diagenetic facies type in the study area.High quality diagenetic facies had mainly developed in an advantageous sedimentary microfacies,which possessed a controlling function on porosity and permeability.Porphyritic corroded porosity diagenetic facies had the highest testing of oil daily production and unit productivity rates,which is the most suitable diagenetic facies of the most conducive to the enrichment and exploitation of oil and gas,and simultaneously is the key development area for next step.Clay minerals cemented tight diagenetic facies and compacted tight diagenetic facies however possess a wide distribution,but with a low production rate,which is mainly due to its poor physical properties.For improved productivity,acidification and fracturing always be taken into consideration in order to modify the reservoir into two types of diagenetic facies.

通过岩心资料、测井资料、分析化验资料,对研究区的沉积相进行研究.利用沉积构造、岩石颜色、重矿物、成熟度等资料分析确定马厂地区的物源方向,明确了马厂翼部地区是三角洲前缘沉积.

For the development of Tahe fracture-cavity bottom water reservoir,about 65 percent of production decline is due to the bottom water rising every year.The water control work is the important task on development process.For the actual development situation of Tahe oil field,using variety of static and dynamic data and testing methods,based on the geological characteristics and development character analysis research result,combined various types of reservoir development of fracture-cavity units,changes of water rate,natural energy and so on,recognize the fracture-cavity reservoir unit deeply.Combined production performance and monitoring data on water injection for oil field,summarized the results of previous research results,evaluate the risk of water coning and give the waning program of Tahe reservoir using fuzzy evaluation method.Production practice evaluation results show that the establishment of early warning of the risk of water-cone method has certain flexibility.To certain extent,this method can play a supporting role in the decision-making on oil field development and production management,and can provide technical support to improve oil recovery of fracture-cavity carbonate reservoir.

The 1st Member of Shahejie Formation is the most important development bed series in Hean area.In the comprehensive geology research.The farcies markers have been studied deeply on reservoir lithology,sedimentary tectonics and well logging curves feature in the study area,joining with sedimentary environments,core observation,earthquake,drill-logging data.In single phase analysis basis,Were comparing with wells Analyzed that the sedimentary environment of Hean area is a period of main shallow lake-half a deep lake-delta front-former delta alternate sedimentary environment,which have been distinguished as follows subaqueous distributary river course,river-mouth bar,between tributary wan,front sheet sands,distal bar and other microfacies.The paper analyzes their distribution the discusses the relation of the micro fancies with lithology,physical properties and oil of the reservoirs.

Qingzuji Region is located at the west slope belt of Dongpu Depression,developing NNE,NE and NW trending extensional normal fracture systems,among which the east dipping basal fracture systems with NNE trending developed in Wuxingji,Shijiaji and Changyuan from west to east are the dominant fracture systems,which divide Qinzuji Region into three NNE trending diagonal faulted steps,namely the third step,second step and first step.The second step and the third step are controlled by faults.So they have greatly changed in shape.Three fracture systems have obviously different effect on hydrocarbon pooling.This paper analyzes the strata development,sedimentary system and evolution of hydrocarbon source rock controlled by the main factures.Combined with reservoir development characteristics,it also points out that Qingzuji Region has the oil-controlling laws that the NNE trending fracture systems controlled the oil reservoir enrichment scale among different steps,the NE trending fracture systems controlled the oil reservoir enrichment extent of the local structure within every step and the small scale faults controlled the oil reservoir partitioning within every local structure.Based on this,the next favorable exploratory zone in the south of Qingzuji Region is proposed,which can provide a reference for exploration of the areas with similar geologic conditions.