【摘要】：通過實(shí)驗(yàn)?zāi)M,氣體組分及同位素特征分析,對(duì)東濮凹陷不同類型天然氣藏進(jìn)行了聚類分析,并對(duì)成因進(jìn)行判識(shí)。明確了古近系和石炭—二疊系2套烴源巖,在高熱演化條件下可依次形成原油裂解氣、湖相泥巖干酪根晚期裂解氣及煤成氣,3種主要生氣方式造就了東濮凹陷深層富氣。成因判識(shí)及氣藏動(dòng)態(tài)過程分析表明,東濮凹陷凝析氣藏及煤成氣藏具有"近源聚集、接力成藏、W型分布"的成藏特征。結(jié)合典型氣藏解剖,指出深層凝析氣及煤成氣的富集主要受高熱演化烴源巖的分布控制,其中,凝析氣藏的有利勘探區(qū)域受深度(小于4 350 m)、坡度(同沉積斷層)、有機(jī)質(zhì)豐度(TOC0.8%)("三度")控制,二次生烴區(qū)域斜坡構(gòu)造部位及深層儲(chǔ)層"甜點(diǎn)"發(fā)育區(qū)是古近系深層凝析氣藏勘探重點(diǎn)領(lǐng)域。煤成氣的有利勘探區(qū)域主要集中在上古生界煤系源巖Ro2.0%、生氣強(qiáng)度大于20×108 m3/km2的區(qū)域,中央隆起帶及斜坡中下部位為有利勘探區(qū)。
[Abstract]:By means of experimental simulation, gas composition and isotopic analysis, the different types of natural gas reservoirs in Dongpu depression are analyzed by cluster analysis, and the origin of the gas reservoirs is identified. Two sets of hydrocarbon source rocks, Paleogene and Carboniferous-Permian, can be formed in order under high thermal evolution conditions. The late kerogen cracking gas and coal-formed gas of lacustrine mudstone have been formed. Three main gas generation modes have resulted in deep rich gas in Dongpu depression. Genetic identification and gas reservoir dynamic process analysis show that the condensate gas reservoir and coal-formed gas reservoir in Dongpu sag have the characteristics of "near source accumulation, relay reservoir formation and W type distribution". Combined with the anatomy of typical gas reservoirs, it is pointed out that the enrichment of deep condensate gas and coal-formed gas is mainly controlled by the distribution of high thermal evolution source rocks, and the favorable exploration area of condensate gas reservoir is subject to depth (< 4 350 m), slope (synsedimentary fault). Organic matter abundance (TOC0.8%) ("three degrees") control, secondary hydrocarbon generating region slope structure and deep reservoir "dessert" development area is the Paleogene deep condensate gas reservoir exploration key area. The favorable exploration area of coal-formed gas is mainly concentrated in the area where the Ro2.0%, gas intensity of the Upper Paleozoic coal measure source rock is more than 20 脳 10 ~ 8 m3/km2, and the central uplift zone and the middle and lower part of the slope are favorable exploration areas.
【作者單位】： 中國石化中原油田分公司;中國石化中原油田分公司勘探開發(fā)研究院;
【基金】：國家科技重大專項(xiàng)課題“東濮凹陷油氣富集規(guī)律與X棿⒘煊頡，

本文編號(hào)：2376146