本文選題：渝東北 + 頁巖氣　； 參考：《成都理工大學(xué)》2015年碩士論文

【摘要】：目前國內(nèi)頁巖氣還處于先期探索階段,不同地區(qū)頁巖氣評(píng)價(jià)標(biāo)準(zhǔn)各不相同。與常規(guī)油氣藏相比,由于頁巖氣藏的成藏特征不同,導(dǎo)致了其地球物理特征也不同,這就增加了利用測(cè)井技術(shù)識(shí)別頁巖氣儲(chǔ)層的難度。另外,由于針對(duì)各種復(fù)雜巖性識(shí)別的成像測(cè)井和井壁取芯方法成本較高、耗時(shí)較長、不能普及到每個(gè)地質(zhì)調(diào)查井中。因此,常規(guī)測(cè)井系列需要提高識(shí)別和評(píng)價(jià)頁巖氣儲(chǔ)層的精度。本文從礦物組分、儲(chǔ)層物性、地化參數(shù)和含氣量等方面,建立了針對(duì)渝東北CK地區(qū)CD4井下寒武統(tǒng)水井沱組頁巖氣地層的測(cè)井評(píng)價(jià)方法。(1)以補(bǔ)償中子和聲波時(shí)差為基礎(chǔ)建立泥質(zhì)含量模型,選用三孔隙度曲線建立砂質(zhì)含量、灰質(zhì)含量模型;(2)選用中子—密度交會(huì)法確定有效孔隙度,采用Timur理論公式計(jì)算滲透率;(3)建立了以補(bǔ)償密度和聲波時(shí)差為基礎(chǔ)的TOC模型;(4)以朗格繆爾模型為基礎(chǔ),考慮溫度、壓力及TOC影響,計(jì)算吸附氣和游離氣含量。開展大量工作,取得如下幾方面的成果與認(rèn)識(shí):1、總結(jié)了該井下寒武統(tǒng)水井沱組優(yōu)質(zhì)頁巖氣儲(chǔ)層的測(cè)井響應(yīng)特征:(1)自然伽馬響應(yīng)特征值總體較高,在斷層破碎帶顯示為異常高值;(2)聲波時(shí)差值相對(duì)較高,且伴隨地層裂縫發(fā)育出現(xiàn)周波跳躍現(xiàn)象;(3)補(bǔ)償中子值顯示為高值;(4)側(cè)向電阻率顯示為中高值,高含氣飽和度導(dǎo)致高側(cè)向電阻率,但裂縫發(fā)育充水會(huì)使側(cè)向電阻率略降低;(5)由于干酪根的密度值較低,因此頁巖氣儲(chǔ)層補(bǔ)償密度值較低。2、建立了巖性識(shí)別圖版。根據(jù)圖版可以有效識(shí)別泥頁巖、灰?guī)r和白云巖等不同顆粒直徑的巖性。3、建立了相關(guān)性和擬合度較高的礦物組分模型、TOC模型。和實(shí)驗(yàn)分析的巖心資料相比,模型擬合度較高、誤差值較小。4、根據(jù)改進(jìn)的朗格繆爾模型和地層的含氣飽和度、有效孔隙度、地層溫度和壓力等參數(shù)建立了吸附氣和游離氣的計(jì)算模型。CD4井全井以吸附氣為主,總含氣量隨深度增加而增加。5、建立了頁巖氣流體識(shí)別模板。該模板以TOC為基礎(chǔ),根據(jù)不同頁巖氣儲(chǔ)層物性參數(shù),有效識(shí)別和評(píng)價(jià)了CD4井頁巖氣優(yōu)質(zhì)儲(chǔ)層。
[Abstract]:At present, the domestic shale gas is still in the early stage of exploration, and the criteria for shale gas evaluation vary from region to region. Compared with conventional oil and gas reservoirs, the geophysical characteristics of shale gas reservoirs are different due to their different reservoir forming characteristics, which makes it more difficult to identify shale gas reservoirs by logging technology. In addition, the imaging logging and sidewall coring methods for complex lithology identification are expensive and time-consuming, so they can not be popularized in every geological survey well. Therefore, conventional logging series need to improve the accuracy of identifying and evaluating shale gas reservoirs. In this paper, from the mineral composition, reservoir physical properties, geochemical parameters and gas content and other aspects, The logging evaluation method of CD4 downhole Cambrian Shuituo formation shale gas formation in CK area of northeast Chongqing was established. The shale content model was established on the basis of compensating neutron and acoustic time difference, and the three porosity curve was used to establish sand content. In this paper, the effective porosity is determined by the neutron-density intersection method, and the permeability is calculated by the Timur formula. The TOC model is established based on the compensation density and acoustic time difference.) the Langmuir model is used as the basis and the temperature is taken into account. The contents of adsorption gas and free gas were calculated under the influence of pressure and TOC. A great deal of work has been carried out, and the following achievements and understandings have been obtained. The logging response characteristics of the well logging response of the well quality shale gas reservoir of the Shaituo formation of the Cambrian series, the natural gamma response characteristic value, are generally high. The difference of acoustic wave in fault fracture zone is relatively high, and the Zhou Bo jump phenomenon appears along with the formation fracture development. The compensated neutron value is shown to be high value and the lateral resistivity is shown to be medium and high value. High gas saturation results in high lateral resistivity, but the lateral resistivity is slightly reduced by water filling during fracture development.) because of the low density of kerogen, the compensation density value of shale gas reservoir is lower than that of shale gas reservoir, and the lithologic identification chart is established. Based on the lithology of shale, limestone and dolomite with different particle diameters, the TOC model of mineral components with high correlation and fitness was established. Compared with the core data analyzed by experiment, the model has higher fitting degree and smaller error value .4.According to the modified Langmuir model and the gas saturation and effective porosity of the formation, The calculation model of adsorbed gas and free gas is established. The whole well of CD4 well is dominated by adsorbed gas, and the total gas content increases with the increase of depth. A shale gas body identification template is established. Based on TOC, the high quality shale gas reservoirs in CD4 well are effectively identified and evaluated according to the physical parameters of different shale gas reservoirs.
【學(xué)位授予單位】：成都理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：P618.13;P631.81

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本文編號(hào)：1841950