扎哈泉地區(qū)上干柴溝組下段致密油藏源、儲參數(shù)測井評價(jià)
本文選題:致密油藏 切入點(diǎn):儲層評價(jià) 出處:《西北大學(xué)》2015年碩士論文 論文類型:學(xué)位論文
【摘要】:致密油的勘探開發(fā)已經(jīng)成為全球油氣資源領(lǐng)域的新的研究熱點(diǎn),除了在北美等地取得巨大成功以外,我國亦在各大陸相含油氣盆地中發(fā)現(xiàn)了可觀的資源量。近年來,柴達(dá)木盆地西南部扎哈泉地區(qū)第三系上干柴溝組下段發(fā)現(xiàn)了致密油藏,鉆井獲得工業(yè)油流。但該區(qū)致密油藏在沉積相、烴源巖及油層特征等方面認(rèn)識程度低,在后續(xù)的優(yōu)勢儲層識別及含油性解釋中遇到了許多困難,急需針對該區(qū)地質(zhì)特征建立有效的源、儲關(guān)鍵參數(shù)測井評價(jià)方法。通過巖心觀察、巖心分析化驗(yàn)測試數(shù)據(jù)及試油試產(chǎn)生產(chǎn)動態(tài)資料綜合分析,對研究區(qū)主要儲層及烴源巖地質(zhì)特征進(jìn)行了分析。研究表明:研究區(qū)上干柴溝組下段巖性復(fù)雜、縱向變化快且礦物成分多樣,多以砂巖、粉砂巖、泥質(zhì)粉砂巖、粉砂質(zhì)泥巖、泥巖及少量泥灰?guī)r薄互層,其中,細(xì)砂巖、粉砂巖為主要儲層,泥巖、泥灰?guī)r為主要烴源巖;儲層孔隙度偏低,孔隙類型以原生殘余粒間孔為主,亦可見少量溶蝕粒內(nèi)孔、晶間微孔及貼�?p;烴源巖有機(jī)質(zhì)豐度中等偏高,有機(jī)質(zhì)類型較好且成熟度較高。在此基礎(chǔ)上,分析儲層和烴源巖的測井響應(yīng)特征并優(yōu)選測井敏感參數(shù),利用重疊圖法、交會圖法、多礦物模型法、多元線性回歸法、泥質(zhì)砂巖含水飽和度計(jì)算公式等方法建立了研究區(qū)致密油藏源、儲關(guān)鍵參數(shù)定性識別方法及定量解釋模型,并對關(guān)鍵井進(jìn)行了解釋。利用解釋成果結(jié)合試油與生產(chǎn)動態(tài)資料分析得出研究區(qū)源儲配置與儲層含油性之間的內(nèi)在聯(lián)系:“優(yōu)質(zhì)源巖—優(yōu)質(zhì)儲層”多形成高產(chǎn)油層,“優(yōu)質(zhì)源巖—差儲層”一般形成差油層或干層,“差源巖—優(yōu)質(zhì)儲層”一般為水層,源巖與儲層條件均較差則一般多為干層或水層。
[Abstract]:The exploration and development of dense oil has become a new research hotspot in the field of oil and gas resources in the world. In addition to the great success in North America and other places, China has also found considerable resources in various continental petroliferous basins. Dense reservoirs were found in the lower member of the Upper Gangchaigou formation of the Tertiary in the southwestern Chahaquan area of Qaidam Basin, and industrial oil flows were obtained by drilling. However, the understanding of the dense reservoirs in this area is low in terms of sedimentary facies, source rocks and reservoir characteristics, etc. Many difficulties have been encountered in subsequent superior reservoir identification and oil-bearing interpretation. It is urgent to establish an effective source and reservoir key parameter logging evaluation method according to the geological characteristics of the area. Based on the comprehensive analysis of core analysis test data and production test production dynamic data, the geological characteristics of main reservoirs and source rocks in the study area are analyzed. The results show that the lithology of the lower member of Shangganchaigou formation in the study area is complex. The longitudinal change is fast and the mineral composition is diverse, most of them are sandstone, siltstone, argillaceous siltstone, silty mudstone, mudstone and a small amount of mudstone thin interbed, among which fine sandstone and siltstone are the main reservoir, mudstone and marlite are the main source rocks. The porosity of reservoir is low, the pore type is mainly primary residual intergranular pore, and a small amount of inner pores, intergranular micropores and sticking fractures can also be found, the organic matter abundance of source rock is relatively high, the organic matter type is better and the maturity is higher. The logging response characteristics of reservoir and source rock are analyzed and logging sensitive parameters are selected. The overlapping map method, cross plot method, multi-mineral model method, multivariate linear regression method are used. Methods such as calculating formula of water saturation in argillaceous sandstone have been used to establish qualitative identification method and quantitative interpretation model of tight reservoir source, key parameters of reservoir and quantitative interpretation model. The key wells were interpreted. The internal relationship between source reservoir configuration and reservoir oil content in the study area was obtained by combining the interpretation results with oil testing and production performance data. "High quality source rock and high quality reservoir" formed high yield reservoir. , "good quality source rock-poor reservoir" generally forms differential reservoir or dry layer, "differential source rock-high quality reservoir" is generally water layer, If the source rock and reservoir condition are poor, they are usually dry or water layer.
【學(xué)位授予單位】:西北大學(xué)
【學(xué)位級別】:碩士
【學(xué)位授予年份】:2015
【分類號】:P618.13;P631.81
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