CAJ | 학술논문

长6油层组是鄂尔多斯盆地冯地坑—洪德地区的重要勘探目的层。因该油层组具有粒度细、成分成熟度低、磨圆度较差、分选性较差的岩石学特征,所以,研究对其储层物性有控制作用的成岩作用具有极其重要的意义。结合单偏光显微镜、扫描电镜、阴极发光、X-射线衍射分析及流体包裹体均一温度测试等资料,对研究区长6油层组的成岩作用进行了系统研究,结果表明：该油层组主要成岩作用有压实作用、压溶作用、胶结作用、交代作用和溶解作用,且成岩演化主要处于中成岩阶段A期。在成岩作用研究基础上,综合黏土矿物成分、胶结物及孔隙的发育状况,把长6油层组划分为5个成岩相：高岭石胶结相、绿泥石胶结相、铁方解石胶结相、绿泥石薄膜＋长石溶蚀相以及长石溶蚀相。其中,绿泥石薄膜＋长石溶蚀相和长石溶蚀相为最有利储集相带。
장6유층조시악이다사분지풍지갱—홍덕지구적중요감탐목적층。인해유층조구유립도세、성분성숙도저、마원도교차、분선성교차적암석학특정,소이,연구대기저층물성유공제작용적성암작용구유겁기중요적의의。결합단편광현미경、소묘전경、음겁발광、X-사선연사분석급류체포과체균일온도측시등자료,대연구구장6유층조적성암작용진행료계통연구,결과표명：해유층조주요성암작용유압실작용、압용작용、효결작용、교대작용화용해작용,차성암연화주요처우중성암계단A기。재성암작용연구기출상,종합점토광물성분、효결물급공극적발육상황,파장6유층조화분위5개성암상：고령석효결상、록니석효결상、철방해석효결상、록니석박막＋장석용식상이급장석용식상。기중,록니석박막＋장석용식상화장석용식상위최유리저집상대。
Chang 6 oil reservoir set is the major exploration target in Fengdikeng-Hongde area of Ordos Basin. Because it has such petrological characteristics as fine grain size, low compositional maturity, poor psephicity and worse sorting, it is extremely important to carry out study on the diagenesis which controls the physical properties of reservoir. Combining with the data from plainlight microscope, scanning electronic microscope, cathodoluminescence, X-ray diffraction analysis and homogenization temperature test of fluid inclusion, the diagenesis of Chang 6 oil reservoir set was studied systematically. The result shows that the main diagenesis types include compaction, pressure solution, cementation, metasomasis and dissolution, and its diagenetic evolution lies mainly in the middle diagenetic stage A. Based on the diagenetic study and combined with clay mineral components, cement and growing situation of pores, the Chang 6 oil reservoir set is divided into five kinds of diagenetic facies, namely kaolinite cementation, chlorite cementation, ferrocalcite cementation, chlorite film plus feldspar dissolution and feldspar dissolution, among which the latter two kinds are the most favorable reservoir facies.