歧口凹陷深层天然气勘探潜力  

Exploration potential of deep natural gas of Qikou Depression

作　　者：王书香[1] 何咏梅[1] 刘庆新[1] 周立英[1] 王兆礼 李红星[1] 

机构地区：[1]中国石油大港油田公司勘探开发研究院,天津300280 [2]中国石油集团渤海钻探工程技术研究院,天津300280

出　　处：《油气地质与采收率》2009年第6期49-52,共4页Petroleum Geology and Recovery Efficiency

基　　金：中国石油股份公司科技管理部"歧口富油凹陷大油气田勘探及综合配套技术研究"的子课题"歧口凹陷天然气主控因素研究与勘探"(2008-030603)

摘　　要：歧口凹陷是黄骅坳陷的主要油气富集区之一,目前发现了奥陶系、中生界、沙三段、沙二段、沙一段、东营组、馆陶组和明化镇组共8套含油气层系,但深层天然气勘探程度低。通过分析歧口凹陷的基本成藏条件认为,歧口凹陷具备形成一定规模天然气的物质基础,且具有烃源岩厚度大、有机质类型好、热演化程度高和演化序列齐全等特点;深层砂体发育和具备独立的成藏系统也是深层天然气成藏的有利条件。近2a,在该区相继部署了歧深1、歧深6、滨深22和滨海4等一批超深井,并取得了可喜成果。通过对歧深1井的初步分析,认为该井沙三段天然气属于高成熟气,来自埋藏更深的沙三段烃源岩,进一步表明歧口凹陷深层天然气具有较大的勘探潜力。Qikou Depression is one of the most prominent petroliferous areas in Huanghua Subbasin. The exploration degree of the deep formations was very low though eight petroliferous layer systems have been found such as Nm,Ng,Ed,Es1 ,Es2,Es3,Mz and Ordovician System by now. After analyzing the basic accumulation conditions,it can be seen that Qikou Depression possesses the abundant matter basis which can form nature gas reservoir with certain scale and has the features of thick source rocks,good organic matter type,high thermal evolution degree and complete evolution series. The favorite conditions for nature gas reservoirs in deep formations include widely developed sand body and the independent accumulation system. The nature gas exploration in the deep formations acquired welcome outcotne recently in Qishenl ,Qishen6,Binshen22,Binhai4 and some other ultra-deep wells in recent two years. According to elemental analysis,the nature gas of Es3 of Qishenl well with high maturity came from the source rocks of deep Es3,which shows that the exploration potential of deep natural gas in Qikou Depression is enormous.

关 键 词：深层 天然气 烃源岩 成藏组合 勘探潜力 歧口凹陷 

分 类 号：TE122.1[石油与天然气工程—油气勘探]