本文選題：致密油藏 + 有效儲(chǔ)層��； 參考：《中國(guó)石油大學(xué)(北京)》2016年博士論文

【摘要】：致密油是非常規(guī)油氣資源的重要組成部分,資源潛力巨大,是今后較為現(xiàn)實(shí)的油氣資源接替領(lǐng)域之一。我國(guó)致密油藏勘探開(kāi)發(fā)起步較晚,總體研究程度較低,特別是對(duì)致密油藏有效儲(chǔ)層物性下限的研究相對(duì)薄弱。在勘探實(shí)踐中發(fā)現(xiàn),致密油藏有效儲(chǔ)層物性下限在不同埋深存在差異,并且當(dāng)儲(chǔ)層物性降低到一定程度時(shí),地層全部變?yōu)楦蓪�。為什么有效�?chǔ)層物性下限會(huì)隨著埋深發(fā)生變化?影響有效儲(chǔ)層物性下限的因素有哪些?如何確定有效儲(chǔ)層的物性下限?這些問(wèn)題的解決對(duì)于合理預(yù)測(cè)致密油藏的分布,準(zhǔn)確計(jì)算致密油藏資源量以及指導(dǎo)致密油藏的勘探都有重要意義。在綜合分析準(zhǔn)噶爾盆地吉木薩爾凹陷蘆草溝組致密油藏地質(zhì)特征的基礎(chǔ)上,采用分布函數(shù)曲線法得到吉木薩爾凹陷致密油藏有效儲(chǔ)層物性下限,發(fā)現(xiàn)有效儲(chǔ)層物性下限具有隨著地層埋深增大逐漸減小的趨勢(shì)。設(shè)計(jì)物理模擬實(shí)驗(yàn)?zāi)M地質(zhì)條件下石油向致密儲(chǔ)層充注的過(guò)程,從而分析有效儲(chǔ)層物性下限的影響因素及變化規(guī)律。利用實(shí)驗(yàn)過(guò)程中的充注動(dòng)力模擬地質(zhì)條件下石油向致密儲(chǔ)層充注的動(dòng)力,利用不同的人工巖心模擬地質(zhì)條件下不同巖石學(xué)特征的致密儲(chǔ)層。通過(guò)研究石油向人工巖心充注時(shí)啟動(dòng)壓力的變化來(lái)分析儲(chǔ)層巖石學(xué)特征對(duì)有效儲(chǔ)層物性下限的影響。研究認(rèn)為:儲(chǔ)層巖石粒徑越粗、分選性越好、石英含量越高則石油向致密儲(chǔ)層充注的臨界注入壓力越小,說(shuō)明石油在儲(chǔ)層中越容易發(fā)生滲流,則有效儲(chǔ)層物性下限越低。通過(guò)分析致密油成藏動(dòng)力學(xué)機(jī)制,建立石油向致密儲(chǔ)層充注的地質(zhì)模型,其中生油增壓是充注的主要?jiǎng)恿?毛細(xì)管壓力是主要阻力。根據(jù)地下滲流理論,建立了生油增壓表達(dá)式,并建立判別致密油藏有效儲(chǔ)層物性下限的方法。在此基礎(chǔ)上分析了烴源巖排烴強(qiáng)度、烴源巖厚度和地層溫度對(duì)有效儲(chǔ)層物性下限的影響。研究認(rèn)為:在其它地質(zhì)條件一定的情況下,烴源巖排烴強(qiáng)度越大、烴源巖厚度越大、地層溫度越高,則有效儲(chǔ)層物性下限越低。應(yīng)用所建立的有效儲(chǔ)層物性下限的判別方法計(jì)算出吉木薩爾凹陷蘆草溝組致密儲(chǔ)層在埋深為2000~2500m、2500~3000m、3000~3500m、3500~4000m和4000~4500m時(shí)有效儲(chǔ)層的臨界孔喉半徑分別為0.352μm、0.287μm、0.230μm、0.187μm和0.147μm;所對(duì)應(yīng)的臨界孔隙度分別為6.9%、5.7%、4.4%、3.2%和1.8%;所對(duì)應(yīng)的臨界滲透率分別為0.249×10-3μm~2、0.148×10-3μm~2、0.085×10-3μm~2、0.051×10-3μm~2和0.028×10-3μm~2。并與分布函數(shù)曲線法的研究結(jié)果進(jìn)行對(duì)比,發(fā)現(xiàn)這兩種方法得到的結(jié)果具有較好的一致性,利用試油結(jié)果對(duì)有效儲(chǔ)層物性下限進(jìn)行可靠性檢驗(yàn),綜合分析認(rèn)為研究結(jié)果較為可靠�；谠撗芯拷Y(jié)果評(píng)價(jià)研究區(qū)有效儲(chǔ)層,并采用容積法計(jì)算出吉木薩爾凹陷蘆草溝組致密油藏資源量為21.6×10~8t。
[Abstract]:Compact oil is an important part of unconventional oil and gas resources. The exploration and development of dense reservoirs in China started late, and the overall research level was low, especially for the lower limit of effective reservoir properties in dense reservoirs. In exploration practice, it is found that the lower limit of physical properties of effective reservoirs in dense reservoirs is different at different burial depths, and when the physical properties of the reservoirs are reduced to a certain extent, all the strata become dry beds. Why does the lower limit of effective reservoir properties change with burial depth? What are the factors that affect the lower limit of effective reservoir properties? How to determine the lower limit of physical properties of effective reservoir? The solution of these problems is of great significance for reasonably predicting the distribution of dense reservoirs, accurately calculating the resources of dense reservoirs and guiding the exploration of dense reservoirs. On the basis of comprehensive analysis of the geological characteristics of dense reservoir in Luchaogou formation in Jimusar depression of Junggar Basin, the lower limit of physical properties of effective reservoir in dense reservoir of Jimusar sag is obtained by using distribution function curve method. It is found that the lower limit of effective reservoir properties decreases with the increase of formation depth. Physical simulation experiments were designed to simulate the filling process of oil into tight reservoir under geological conditions, and the factors affecting the lower limit of physical properties of effective reservoir and its variation law were analyzed. The injection dynamics in the experiment process is used to simulate the filling power of the oil to the tight reservoir under geological conditions and the different artificial cores are used to simulate the tight reservoir with different petrological characteristics under the geological conditions. The effect of reservoir petrological characteristics on the lower limit of effective reservoir properties is analyzed by studying the change of start-up pressure when oil is injected into artificial core. The study shows that the coarser the grain size of reservoir rock, the better the sorting property and the higher the quartz content, the smaller the critical injection pressure of oil to tight reservoir, which indicates that the more easily percolation of oil in reservoir, the lower limit of effective reservoir physical property. Based on the analysis of the dynamic mechanism of tight oil reservoir formation, a geological model of oil filling into tight reservoir is established, in which oil source pressurization is the main driving force and capillary pressure is the main resistance. According to the theory of underground percolation, the oil source pressurization expression is established, and the lower limit of physical properties of effective reservoir in dense reservoir is established. On this basis, the effects of hydrocarbon expulsion intensity, source rock thickness and formation temperature on the lower limit of effective reservoir properties are analyzed. The study shows that under certain geological conditions, the lower limit of effective reservoir property is, the greater the hydrocarbon expulsion intensity of source rock is, the greater the thickness of source rock is and the higher the formation temperature is. The critical pore throat radius of effective reservoir is 0.352 渭 m, 0.287 渭 m, 0.230 渭 m ~ 0.230 渭 m and 0.147 渭 m, respectively, when the buried depth of the dense reservoir of Lucaogou formation in Jimusar sag is 2000 ~ 2500m ~ 2500m ~ (3000m) ~ 3000m ~ 3500m ~ 3500m and 4000m ~ 4500m respectively, and the critical pore throat radius of the reservoir is 0.352 渭 m ~ (0.287) 渭 m ~ (0.230) 渭 m ~ (0.187) 渭 m and 0.147 渭 m ~ (m) respectively. The critical permeability is 0.249 脳 10 ~ (-3) 渭 m ~ (-2), 0.148 脳 10 ~ (-3) 渭 m ~ (2), 0.085 脳 10 ~ (-3) 渭 m ~ (2) 渭 m ~ (2) ~ (2) 0. 051 脳 10 ~ (-3) 渭 m ~ (2) and 0.028 脳 10 ~ (-3) 渭 m ~ (2), respectively. Compared with the results of the distribution function curve method, it is found that the results obtained by the two methods are in good agreement, and the reliability of the lower limit of effective reservoir properties is tested by the oil test results. The comprehensive analysis shows that the results of the study are more reliable. Based on the results of the study, the effective reservoirs in the study area are evaluated, and the volume method is used to calculate the resource quantity of the dense reservoir of Luchaogou formation in Jimusar depression for 21.6 脳 10 ~ (8) t.
【學(xué)位授予單位】：中國(guó)石油大學(xué)(北京)
【學(xué)位級(jí)別】：博士
【學(xué)位授予年份】：2016
【分類號(hào)】：P618.13

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