【作者】 段新国；

【导师】 王允诚；

【作者基本信息】 成都理工大学 ， 油气田开发工程， 2007， 博士

【摘要】 在我国当前及未来能源日益短缺的情况下，陆相浅层气资源成为我国能源来源的重要方向，是今后油气勘探开发的一个重点。浅层气通常是指埋深浅于1500m的各类天然气资源，主要包括生物气、油型气、煤层甲烷气、水溶气等。我国的浅层天然气资源主要分布于江浙沿海、南方小型中新生代盆地、东部含油气盆地、柴达木盆地、四川盆地、部分大型油田的上部含油气组合及主要成煤盆地。陆相浅层气藏面积小，影响因素多，不易识别，这限制这部分资源的开采利用，本论文就是针对这些问题以大庆长垣南部黑帝庙浅层气藏为例提出了一套早期评价陆相浅层气藏的方法。取得的主要成果如下：1．整个工区由近南北向的葡萄花构造带和北东向的葡西鼻状构造带组成。断裂在平面上表现出一定的规律性，呈六个断裂密集带展布。受断裂切割，工区内形成一系列圈闭，圈闭有五种类型：断鼻、断背、断块、背斜、穹隆，其中以断鼻和断背为主。2．首次发现了明水组地层沉积前后，研究区构造发生了巨大的反转，明水组沉积前后工区的构造格局由原来“三隆夹两凹”转变为现今的“一隆”构造格局。古构造高点可能是当时油气运聚的指向区，这一认识大大扩展了黑帝庙层浅层气的勘探领域。3．结合地震相分析、测井约束砂体反演及振幅砂体反演成果，认为黑帝庙油层沉积相是在松辽湖盆逐步上升收缩的构造背景下和分散的近物源小水系沉积背景下形成的一套反旋回性的砂泥岩沉积物。主要的沉积微相类型有水下分流河道微相、分流间湾微相、河口坝微相和远砂坝微相，单砂体以多层式或孤立式为主。4．运用模糊识别的技术及AVO烃类检测技术对三维地震工区进行了天然气预测，两种方法进行的天然气预测效果都比较好，预测结果表明研究地区天然气分布相对零散，分布面积小，但天然气总储量具有一定规模。5．将现今圈闭、古圈闭、沉积相及砂体厚度、模糊识别结果、AVO检测结果等研究成果综合起来，运用灰色系统方法进行了圈闭综合评价，运用风险分析法进行圈闭综合评价。最终提出了有利地区及有利圈闭。在此研究基础上，确定葡194-16井为试气井，现场试气获得高产工业气流，葡194-16井试气最高日产气量91667m~3。更多还原

【Abstract】 On the condition of increasingly shortage of energy resources in our country atpresent and in the future, the resource of shallow gas is an important aspect to solvethis problem, and it also is an important part in oil and gas exploration. Shallow gasusually is the nature gas resource which cover depth is less than 1500m, and it includebiogas, gas separated from oil, coalbed methane, hydrogas etc. Shallow gas resourcesin our country mainly distribute in inshore of Jiangsu and Zhejiang, small southwardMeso-cenozoic bason, eastward petroliferous basin, tsaidamense bason, sichanbason, top formation of some big oilfields and main coal-forming bason. Continentalfacies shallow gas reservoirs have some characteristics, such as the area is small,affecting factor is complex, so which is difficult to identify. These limited theexploitation of this resource. In this article, the author take Heidimiao gas reservoirdescription as an example to put forward a suit of early shallow gas reservoirdescription methods.Through the research, the following results are achieved:1. The whole region are formed by submeridional Putaohua structure belt andnorth-eastward Puxi nose like structure belt. Faults present definite regularity in plane,which formed six fault crowd zones. Cutted by these faults, there are series of traps inthe region of interest. The traps have five types: fault noise, fault anticline, fault block,anticline and dome. The main types are fault noise and fault anticline.2. We discovered that the structure here occured big reverse fore and aft thedeposition of Mingshui formation. Before deposition of Mingshui formation, structureformat is "THREE UPLIFT CLIP TWO SUNKEN", and after deposition of Mingshuiformation, structure format is "ONE UPLIFT". So the palaeostructure summitspossibly are available areas to which gas and oil migrated and assembled. This finding expands the exploitation territory of shallow gas.3. Integrating with the seismic facies analysis results, the log limited sandstoneinversion results and the amplitude sandstone inversion results, the author consideredHeidimiao precipitation facie were a set of anti-cyclicity sandstone and mudstonesediment, which on the structure background of Songliao lake bason shrink steeplyand on the sedimentary background of dispersive proximal little water system. Themain deposit microfacies are underwater distributary channel, split flow mud bay,mouth bar and sand sheet. The single sandstone distribution forms mainly are anmultilayer type and isolation type.4. We used fuzzy identification technique and AVO hydrocarbon indicatortechnique to predict the distribution of nature gas, and discovered that the predicteffect of the two methods was good. The result indicate that the distribution of naturegas is scattered, and the area is small, but the whole reserves is considerable.5. Integrating all results such as nowadays traps, old traps, phases, thickness ofsandstone, result of fuzzy identification and AVO hydrocarbon indicator, weevaluated the advantage areas by using gray correlation analysis technique, andevaluated the advantage traps by using geological holding coefficient technique.Finally, the author bring forward the advantage areas and traps. On the basis ofresearches above, finally the author ascertain well P194-16 as a test well. The tiptopproduction of this well is 91667m~3/d, and the result is inspirer.更多还原