四川盆地侏罗系大安寨段湖相含云质储层成因研究

发布时间：2018-02-04 11:28

本文关键词： 含云质储层储集空间含云质储层成因大安寨段四川盆地　出处：《中国地质》2017年01期 　论文类型：期刊论文

【摘要】：四川盆地侏罗系大安寨段是典型的致密油发育层段,勘探开发成果揭示,大安寨储层岩性主要为介壳灰岩致密储层。侏罗系大安寨段致密油勘探开发成效引人关注,特别是近期川中南部侏罗系大安寨段滨浅湖相的GSTMX地区,大安寨段显示频繁,部署的GQ1H在大安寨段获得高产工业油流。根据对最新钻探的GQ1H井解剖表明,含云质岩具有更好的储集条件和含油气性,是储层"甜点"有利分布岩性。通过老井复查、岩心、岩屑、薄片、测井等综合分析表明,含云质储层岩性包括云质灰岩、灰质云岩和泥-粉晶云岩,储集空间主要为粒间、粒间溶孔和微裂缝,储层储集条件好,成像显示溶蚀孔洞发育,川中南部云化程度高于北部。根据碳氧同位素、X衍射、地层水特征以及古地形综合分析初步认为,四川盆地大安寨沉积时期虽然为淡水湖泊,但在古地形、古气候、沉积环境以及湖平面变化共同控制下,局部地区仍然发育一定规模的含云质储层,该认识为川中侏罗系大安寨段相对优质储层深化认识奠定了坚实的地质基础。
[Abstract]:DAANZAI member in Sichuan basin is a typical tight oil reservoir development, exploration and development results reveal that the DAANZAI reservoir lithology is mainly lacustrine limestone reservoir of Jurassic period. Da an Zhai development of tight oil exploration results concern, especially the recent South Sichuan Jurassic Da an Zhai Duan shore shallow lake the GSTMX area, Da'anzhai display frequently deployed GQ1H to obtain high-yield industrial oil in the Da'anzhai flow. According to the latest drilling well GQ1H anatomy showed that set conditions and oil and gas bearing dolomitic has better reservoir, is a reservoir "dessert" distribution of the favorable lithology. Through the old, cores, cuttings, sheets, comprehensive logging analysis showed that with dolomitic reservoir lithology include dolomitic limestone, calcareous dolomite and micritic dolomite, reservoir space is mainly intergranular, intergranular pores and micro cracks, reservoir conditions, imaging pores development, Sichuan The southern cloud is higher than the north. According to the carbon and oxygen isotope, X diffraction, the characteristics of formation water and landform analysis suggested that an Sichuan basin sedimentary period although the freshwater lake village, but in ancient terrain, paleoclimate, sedimentary environment and common control of lake level changes, regional development is still cloud storage quality layer with a certain scale, the understanding of lay a solid foundation for Da'an Sichuan Jurassic Village section of relatively high-quality reservoirs to deepen understanding.

【作者单位】：中国石油西南油气田分公司勘探开发研究院;中国石油川庆钻探工程公司地球物理钻探公司二分公司;中国石油集团科学技术研究院;
【基金】：四川盆地侏罗系石油勘探开发关键技术研究(2012E-2601) “十三五”国家重大油气专项大型油气田及煤层气开发“致密油富集规律与勘探开发关键技术”(2016ZX05046)联合资助~~
【分类号】：P618.13
【正文快照】： 二分公司,重庆402160;3.中国石油集团科学技术研究院,北京100083)old-wells’reinvestigation data,cores,cuttings,rock chips and well logging shows that the lithology of dolomitic reservoir includesdolomitic limestone,limy dolomite and micrite-crystal powder do

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