【摘要】：隨著油氣勘探開(kāi)發(fā)的不斷深入,勘探開(kāi)發(fā)區(qū)域構(gòu)造活動(dòng)愈來(lái)愈復(fù)雜、深井超深井所占的比率越來(lái)越大,油氣井鉆探過(guò)程中鉆遇高溫高壓層位機(jī)率呈直線增長(zhǎng)態(tài)勢(shì),也將面臨著更為嚴(yán)重的噴、漏、塌、卡等復(fù)雜情況。對(duì)地層巖石力學(xué)特性的充分了解,是有效避免鉆井過(guò)程中復(fù)雜情況發(fā)生的必要條件之一。本論文的具體研究?jī)?nèi)容如下:(1)多孔彈性模型。本論文在原有線彈性理論模型的基礎(chǔ)上充分考慮了儲(chǔ)層中流-固耦合效應(yīng)對(duì)原地應(yīng)力場(chǎng)的影響,并以平面應(yīng)變狀態(tài)假設(shè)為基礎(chǔ),利用廣義胡可定律、有效應(yīng)力定律、彈性Navier理論方程以及線性疊加原理等得到井壁圍巖應(yīng)力分布多孔彈性力學(xué)分析模型。(2)室內(nèi)評(píng)價(jià)實(shí)驗(yàn)。以現(xiàn)場(chǎng)巖心為研究對(duì)象,采用巖石力學(xué)三軸實(shí)驗(yàn)系統(tǒng)、壓力傳遞實(shí)驗(yàn)系統(tǒng)、聲波測(cè)試儀等儀器設(shè)備等實(shí)驗(yàn)設(shè)備分別測(cè)試巖心在常溫與高溫條件下彈性力學(xué)參數(shù)、強(qiáng)度參數(shù)、有效應(yīng)力系數(shù)等基礎(chǔ)特征參數(shù),并利用滲透率與孔隙度測(cè)試儀探究了巖心的物性參數(shù)—滲透率與孔隙度,為后續(xù)模型的建立提供基礎(chǔ)數(shù)據(jù)。(3)多因素巖石力學(xué)參數(shù)測(cè)井解釋模型。以室內(nèi)靜態(tài)巖石力學(xué)測(cè)試結(jié)果與現(xiàn)場(chǎng)測(cè)井資料為基礎(chǔ),獲取巖石力學(xué)參數(shù)的敏感因素及其最佳的擬合函數(shù),以遺傳算法為數(shù)據(jù)擬合優(yōu)化算法,建立巖石靜態(tài)參數(shù)的多因素測(cè)井解釋模型,并與現(xiàn)有的經(jīng)驗(yàn)?zāi)Ｐ瓦M(jìn)行簡(jiǎn)要的對(duì)比分析。(4)地層壓力特性評(píng)價(jià)。在多孔彈性理論模型與多因素巖石力學(xué)參數(shù)測(cè)井解釋模型的基礎(chǔ)上,以巖石的強(qiáng)度參數(shù)與儲(chǔ)層測(cè)井、錄井等資料為基礎(chǔ),,獲取地層全井身三壓力值,并依據(jù)地層三壓力剖面特征,確定異常壓力層位,并給出相應(yīng)的對(duì)策。
[Abstract]:With the deepening of oil and gas exploration and development, the tectonic activity in exploration and development area is becoming more and more complicated, and the proportion of deep wells in ultra-deep wells is increasing more and more. The probability of drilling high temperature and high pressure layers in oil and gas wells is increasing linearly in the process of drilling. Will also face more serious spray, leakage, collapse, card and other complex situation. To fully understand the mechanical properties of formation rock is one of the necessary conditions to avoid the complex situation in drilling process. The main contents of this thesis are as follows: (1) porous elastic model. In this paper, based on the original linear elastic theory model, the effect of fluid-solid coupling effect on the original in-situ stress field is fully considered, and based on the assumption of plane strain state, the generalized Hook's law and the effective stress law are used. The elastic Navier theory equation and the linear superposition principle are used to obtain the porous elastic mechanics analysis model of surrounding rock stress distribution. (2) Indoor evaluation experiment. Taking the field core as the research object, the parameters of elastic mechanics and strength of rock core under normal and high temperature conditions were measured by means of triaxial experimental system of rock mechanics, pressure transfer experiment system, acoustic wave tester and so on. The effective stress coefficient and other basic characteristic parameters are studied by using permeability and porosity tester, which provides the basic data for the subsequent establishment of the model. (3) the logging interpretation model of multi-factor rock mechanics parameters. Based on indoor static rock mechanics test results and field logging data, the sensitive factors of rock mechanics parameters and their best fitting functions are obtained. Genetic algorithm is used as the data fitting optimization algorithm. The multi-factor log interpretation model of rock static parameters is established and compared with the existing empirical model. (4) Evaluation of formation pressure characteristics. On the basis of the porous elastic theory model and the logging interpretation model of multi-factor rock mechanics parameters, based on the data of rock strength parameters and reservoir logging and logging, the three pressure values of the whole well are obtained. According to the characteristics of formation three pressure profile, the abnormal pressure layer is determined, and the corresponding countermeasures are given.
【學(xué)位授予單位】：中國(guó)石油大學(xué)(華東)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：TE311

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