川口油田长6段油层组储集层特征与油气富集规律

在分析陕西川口油田长６油层组沉积相特征的基础上，对储集层的岩石学特征和成岩作用以及孔隙结构进行了研究。认为长６油层组的环境演化代表了浅水台地型三角洲逐渐转变为陆上平原的历史，曲流河道砂体是区内油气富集的有利相带。浊沸石、方解石、绿泥石的胶结、化学压实作用和浊佛石、长石的溶解作用是影响砂岩储集性能的主要因素。孔隙的演化与盆地的演化密切相关。长６油层组及其上下层位构成了一套良好的生储盖组合，长６１和６２段是川口油田的主力油层。

Reservoir Characteristics and Hydrocarbon Accumulation Regularity of the Chang 6 Oil bearing Beds in the Chuankou Oil Field, Shaanxi Province

Based on analysing sedimentary characteristics of the Chang 6 oil bearingbeds in the Chuankou oil field, the author has studied petrological characteristics,diagenesis and porosity structure and suggest that the evolution of the environment during deposition the Chang 6 oil bearing beds represents the history when the water platform delta was gradually transformed into a terrestrial plain. The meander channel sandbodies are the major oil bearing facies in this area. The cementation of laumontite, calcite and chlorite, the pressure solution, as well as the dissolution of laumontite and feldspar are the main causes to effect reservoir ability of oil bearing arkoses. The evolution of porosity has a close relationship with the diagenetic history and the evolution of basin. The Chang 6 oil bearingbeds and its up down position constitute a good resoure reservoir cap rock combination. The Chang 6 1 and the Chang 6 2 members are the major reservoirs in the Chuankou area.