二連盆地巴音都蘭凹陷阿爾善組云質(zhì)巖儲(chǔ)層特征
[Abstract]:In order to study the petroliferous reservoir characteristics of the Lower Cretaceous Arshan formation in the Bayindolan Sag, the lithologic classification of the dolomite reservoir of the Alshan formation is made by using the data of core, cast sheet, cathode luminescent sheet, scanning electron microscope and X-ray diffraction. Reservoir space types, physical properties and diagenesis are studied. The results show that the dolomite reservoirs of the Alshan formation can be divided into two main categories, namely, dolomite and dolomite sandstone, which can be further subdivided according to the occurrence of dolomite. Dissolution pores, fractures and intergranular pores are mainly developed in dolomitic mudstone, with porosity of 4.4% and 36.4%, with an average of 16.01, and permeability of 0.01 ~ 26.30 mD, with an average of 1.92 mD;. The dissolution pores are mainly developed in cloud sandstone, with porosity of 1.1g / 33.7, mean value of 16.07m, permeability of 0.01g / 163.00 mD, and average of 79.72 mD. / min. The diagenetic sequence of dolomitic mudstone is metasomatism and dissolution, and the diagenetic sequence is: (iron) dolomite formation, organic acid formation and (iron) dolomite dissolution; Dissolution, cementation and metasomatism are the main types of dolomite. The diagenetic sequence is as follows: slightly compacted quartz secondary augmentation of dolomite cementation, and dissolution of organic acid in metasomatism to form dolomite and feldspar. Therefore, studying the characteristics of dolomite reservoir is of great significance for oil and gas exploration of Alshan formation in this area.
【作者單位】: 中國(guó)石油大學(xué)(北京)地球科學(xué)學(xué)院;中國(guó)石油大學(xué)(北京)油氣資源與探測(cè)國(guó)家重點(diǎn)實(shí)驗(yàn)室;中國(guó)石油華北油田分公司勘探開發(fā)研究院;
【基金】:國(guó)家重大科技專項(xiàng)“巖性地層油氣藏沉積體系、儲(chǔ)層形成機(jī)理與分布研究”(編號(hào):2011ZX05001-002) 中國(guó)石油華北油田項(xiàng)目“二連盆地特殊巖類儲(chǔ)集層特征及其成因機(jī)制研究”(編號(hào):HBYT-YJY-2014-JS-307)聯(lián)合資助
【分類號(hào)】:P618.13
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