CAJ | 학술논문

为探讨致密砂岩气藏成岩相的定量划分方法，以鄂尔多斯盆地神木气田山1段储层为例，综合利用多种测试结果和测井资料对成岩作用类型、成岩作用强度和成岩相进行了分析评价。根据成岩和测井参数建立了成岩相划分标准，阐述了不同成岩相的基本特征。研究区山1段储层发育溶蚀孔、晶间孔和少量粒间孔，压实程度中等为主，局部发育弱和强压实，胶结程度中等为主，含少量弱和强胶结，溶解程度中等—强。依据成岩作用强度、胶结类型和孔隙类型，可划分出5种成岩相，基于自然伽马、深侧向电阻率、声波时差和密度资料建立的测井参数划分标准可对成岩相进行有效识别。成岩相与沉积微相之间存在良好的对应关系，优势沉积微相控制有利成岩相分布。不同成岩相的特征存在明显差异，分布于三角洲平原分流河道微相的中等压实伊利石、绿泥石胶结—溶蚀孔＋粒间孔相和中等压实伊利石、高岭石胶结—溶蚀孔＋晶间孔相是研究区的有利成岩相带。
위탐토치밀사암기장성암상적정량화분방법，이악이다사분지신목기전산1단저층위례，종합이용다충측시결과화측정자료대성암작용류형、성암작용강도화성암상진행료분석평개。근거성암화측정삼수건립료성암상화분표준，천술료불동성암상적기본특정。연구구산1단저층발육용식공、정간공화소량립간공，압실정도중등위주，국부발육약화강압실，효결정도중등위주，함소량약화강효결，용해정도중등—강。의거성암작용강도、효결류형화공극류형，가화분출5충성암상，기우자연가마、심측향전조솔、성파시차화밀도자료건립적측정삼수화분표준가대성암상진행유효식별。성암상여침적미상지간존재량호적대응관계，우세침적미상공제유리성암상분포。불동성암상적특정존재명현차이，분포우삼각주평원분류하도미상적중등압실이리석、록니석효결—용식공＋립간공상화중등압실이리석、고령석효결—용식공＋정간공상시연구구적유리성암상대。
Diagenesis types, intensity and facies were evaluated using a variety of laboratoryresults and logging data in order to explore the quantitative classification method of diagenetic facies in tight sandstone gas reservoirs. Diagenetic facies classification standardswere established based on diagenesis and logging parameters. The basic characteristics of different diagenetic facies were elaborated taking the first member of Shanxi Formation in the Shenmu Gas Field in the Ordos Basin as an example.Dissolved pores, intercrystalline pores and small amounts of intergranular pores developed in the first member of Shanxi Formation in the study area. The formation is characterizedby medium compaction ( locally weak or strong compaction) , medium cementation ( locally weak or strong cementation) , and medium to strong dissolution. Five diagenetic facies weredefinedaccording to diagenesis intensity, cementation and pore types.Furthermore, diagenetic facies could be effectively recognized based on natural gamma ray logging, deep lateral resistivity logging, density logging and acoustic logging.The distribution of favorable diagenetic facies was controlled by advantageous sedimentary microfacies. Obvious differences appear among different diagenetic facies. Moderate compaction illite, dissolution pore+intergranular pore facies with eitherchloriteor kaolinite cementation, dis?tributed in distributary channel microfacies of delta plains are favorable diagenetic facies in the study area.