【摘要】：蘇77、召51區(qū)塊位于鄂爾多斯盆地北部,中央古隆起東側(cè),蘇里格氣田東區(qū)西北區(qū)域。西起達(dá)來溝,東至通崗浪溝,北起加不沙,南接烏審召,面積約2007km2。天然氣勘探自2000年開始,證實(shí)了蘇里格氣田的主力氣層為下石盒子組盒8段以及山西組山1段。然而,近幾年的開發(fā)實(shí)踐表明：上古生界儲(chǔ)層的致密性好、巖屑的含量高、有很強(qiáng)的非均質(zhì)性,儲(chǔ)層的預(yù)測(cè)難度大；含氣砂體的規(guī)模小,有效儲(chǔ)層具有較差的連續(xù)性和連通性,可采的單井儲(chǔ)量低。因此,積極挖掘下古生界氣藏的開發(fā)潛力,降低產(chǎn)能建設(shè)風(fēng)險(xiǎn),成為氣田實(shí)現(xiàn)經(jīng)濟(jì)有效開發(fā)的重要途徑,氣田堅(jiān)持“上下古立體開發(fā)”的思路,取得了較好的開發(fā)效果。根據(jù)最新資料統(tǒng)計(jì),蘇里格氣田東區(qū)累計(jì)加深至下古開發(fā)井460余口,鉆遇氣層/含氣層井278口。其中,鉆遇上組合氣層/含氣層井236口,平均有效厚度3.4m；鉆遇中組合氣層/含氣層井97口,平均有效厚度3.5m。平均無阻流量達(dá)到25.9×104m3/d,最高無阻流量達(dá)到231×104m3/d(SD39-59A),相對(duì)上古氣藏而言,下古生界氣藏顯示出較強(qiáng)的產(chǎn)氣能力,對(duì)于提高該地區(qū)單井產(chǎn)量具有十分重要的意義。盡管下古生界氣藏的開發(fā)取得了一定的成效,但就氣藏的整體開發(fā)而言,仍然面臨著一些問題,包括部分地層分布特征不清、上組合和中組合白云巖的形成機(jī)理和分布規(guī)律尚不明確,有效儲(chǔ)層的發(fā)育特征、控制因素及其分布規(guī)律研究有待深入等等,都影響了有利區(qū)的預(yù)測(cè)及氣藏的進(jìn)一步開發(fā)規(guī)劃。因此,有必要對(duì)該區(qū)下古氣藏開展地質(zhì)研究,加深對(duì)有效儲(chǔ)層的精細(xì)化認(rèn)識(shí),為該區(qū)下古氣藏整體開發(fā)方案的編制及產(chǎn)能建設(shè)優(yōu)化部署提供科學(xué)合理的依據(jù)。以蘇里格東區(qū)的研究資料為基礎(chǔ),通過對(duì)工區(qū)內(nèi)140多口探井及開發(fā)井的詳細(xì)研究,利用大量的測(cè)井資料并結(jié)合標(biāo)志層的識(shí)別,對(duì)研究區(qū)馬五段各小層進(jìn)行了細(xì)致的劃分與對(duì)比,統(tǒng)計(jì)出各層位的完錯(cuò)情況,并編繪了地層對(duì)比圖,弄清了地層的分布規(guī)律。通過對(duì)巖心、巖石薄片、測(cè)井資料觀察和研究,在單井、聯(lián)井研究的基礎(chǔ)上,認(rèn)為研究區(qū)屬于潮坪相,識(shí)別出2種亞相和8種微相,并采用單因素分析作圖法編制了各小層的沉積相平面圖。通過對(duì)研究區(qū)多種主要儲(chǔ)層類型的研究認(rèn)為,馬五5主要的儲(chǔ)層則是由準(zhǔn)同生白云巖和埋藏白云化所形成的白云巖為主,其晶粒較粗,部分晶粒達(dá)到細(xì)晶級(jí)別,晶間孔發(fā)育。馬五6-10以泥晶-細(xì)粉晶云巖、粗粉晶云巖為有利的儲(chǔ)層。通過對(duì)區(qū)內(nèi)研究層段儲(chǔ)集巖的成巖作用,認(rèn)為廣泛發(fā)育的成巖作用有白云巖化、古巖溶、膠結(jié)交代、重結(jié)晶、壓溶等,其中以白云化作用、溶蝕作用和充填作用對(duì)儲(chǔ)集性的影響意義最大。通過對(duì)各研究層段儲(chǔ)集性的總體特征及其平面變化規(guī)律的研究,從沉積微相及巖性、構(gòu)造、成巖作用等方面分別探討了影響儲(chǔ)層儲(chǔ)集性的主要因素,并分析了有效儲(chǔ)層的展布規(guī)律,為有利區(qū)預(yù)測(cè)提供依據(jù)。根據(jù)儲(chǔ)層的物性參數(shù)、孔隙結(jié)構(gòu)、沉積微相及組成巖性、儲(chǔ)集空間組合類型、成巖作用等綜合指標(biāo),建立了儲(chǔ)層分類體系,按照該體系對(duì)各研究小層進(jìn)行了儲(chǔ)層分類和綜合評(píng)價(jià)。綜合考慮沉積相、成巖作用、物性和古巖溶地貌等儲(chǔ)層發(fā)育的控制因素,在對(duì)各小層有利區(qū)預(yù)測(cè)的基礎(chǔ)上,優(yōu)選出研究區(qū)各小層的有利區(qū)。
[Abstract]:The 51-block is located in the north of the Ordos Basin, the east of the central ancient uplift, and the northwest of the east of the Sulige gas field. From the west to the gullies, from the east to the on-the-the-gang wave ditch, the north from the non-sand, south to the UAI, the area is about 2007km2. Since 2000, the natural gas exploration has confirmed that the main gas layer in the Sulige gas field is the lower stone box group box 8 and the Shanxi Formation Mountain 1. However, the development practice in recent years has shown that the upper Paleozoic reservoir has good compactness, high content of rock cuttings and strong non-homogeneity, and the prediction of the reservoir is large; the size of the gas-bearing sand body is small, the effective reservoir has poor continuity and connectivity, and the recoverable single well is low in reserves. Therefore, the development potential of the lower Paleozoic gas reservoir is actively excavated, the risk of capacity construction is reduced, and the important way to realize the effective development of the gas field is an important way to realize the effective development of the gas field. According to the latest data statistics, the east side of the Sulige gas field has been deepened to the remaining 460 of the next development well, and the drilling is in the gas-bearing layer/ gas-bearing well 278. The average effective thickness is 3.4m, and the average effective thickness is 3.5m. The average open-flow rate is 25.9-104m3/ d, the maximum open-flow rate reaches 231-104m3/ d (SD39-59A), and the lower Paleozoic gas reservoir shows a strong gas-producing capacity relative to the upper paleogas reservoir, which is of great significance to the improvement of the single-well production in the region. Although the development of the lower paleozoic gas reservoir has achieved some results, the whole development of the gas reservoir still faces some problems, including the partial formation distribution, the formation mechanism and the distribution rule of the upper and middle combination dolostones are not clear, the development characteristics of the effective reservoir are not clear, The control factors and their distribution law are still to be studied, and the prediction of the favorable area and the further development and planning of the gas reservoir are affected. Therefore, it is necessary to carry out the geological research to the ancient gas reservoir in this area, to deepen the fine understanding of the effective reservoir, to provide scientific and reasonable basis for the preparation of the whole development plan and the optimal deployment of the production capacity. Based on the research data of the eastern side of the Sulige area, through the detailed study of the 140 multi-port exploratory well and the development well in the work area, a large number of well logging data is used and the identification of the sign layer is used, and the small layers of the five sections of the study area are divided and compared with each other, and the error condition of each layer is counted. The stratigraphic correlation diagram is compiled and the distribution rule of the formation is clarified. Based on the observation and study of core, rock sheet and logging data, the study area belongs to the tidal flat phase, and two sub-phases and 8 micro-phases are identified, and a single-factor analysis and mapping method is used to prepare the sedimentary facies plan of each small layer. Based on the study of many main reservoir types in the study area, the main reservoir of Math5 is the dolomite which is formed by the quasi-cogenic dolomite and the buried dolomitization, and the grain of the main reservoir is coarse, and some of the grains reach the fine grain level and the intercrystalline pore is developed. MAV 6-10 is a favorable reservoir for the fine-fine-fine-grained, fine-grained, fine-grained, fine-grained, fine-grained, fine-grained, fine-grained, fine-grained, fine-grained, fine-grained, fine-grained, fine-grained, fine-grained, fine-grained, fine-grained, It is believed that the diagenetic effect of the extensive development is dolomitization, paleokarst, cementation and metasomatism, recrystallization, pressure dissolution, etc., in which the effect of dolotization, dissolution and filling on the reservoir property is the most important. The main factors that influence the reservoir property are discussed from the aspects of sedimentary microfacies and lithology, structure and diagenesis, and the distribution rule of the effective reservoir is analyzed. The reservoir classification system is established according to the physical property parameters of the reservoir, the pore structure, the sedimentary microfacies and the comprehensive indexes such as the lithology, the combination type of the reservoir space and the diagenesis, and the reservoir classification and the comprehensive evaluation are carried out for each small layer according to the system. Considering the control factors of the development of the sedimentary facies, diagenesis, physical property and the ancient rock and the like, the beneficial area of each small layer of the study area is preferably calculated on the basis of the prediction of the beneficial area of each small layer.
【學(xué)位授予單位】：長(zhǎng)江大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：P618.13

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本文編號(hào)：2363273