致密砂巖儲層壓實-膠結(jié)作用演化路徑力學(xué)分析
[Abstract]:In the diagenetic evolution of tight sandstone reservoir, compaction and cementation play an important role in reservoir properties. The evolution path of compact-cementation in tight sandstone reservoir is discussed. It has important reference value for recovering pore evolution of tight reservoir during geological history period and making reasonable exploration and development plan. Based on this, the evolution path of compaction and cementation of tight sandstone reservoir and the change characteristics of corresponding rock mechanical properties are discussed in this paper. The results show that in the early stage of diagenetic evolution, the changes of physical and mechanical properties of rocks are mainly affected by compaction, but the cementation is not significant, but the effect of compaction in late diagenesis on the changes of physical and mechanical properties of rocks is relatively small. At this point, the cementation plays the most important role. With diagenesis, the internal pores of tight sandstone are gradually homogenized and tend to be round. The decrease of formation rock stress in denudation process is larger than that of formation rock stress increase in sedimentary process. Therefore, for sedimentary basins with strong denudation, the tight sandstone reservoirs developed within the basins often have relatively good physical properties and potential for oil and gas development. The evolution of compact-cementation of tight sandstone is accompanied by the change of porosity and mechanical properties. The relationship between compactness and cementation can be discussed in depth, which can be used as a reference for the evaluation of tight sandstone reservoir and prediction of desserts area.
【作者單位】: 中國地質(zhì)大學(xué)能源學(xué)院;中國地質(zhì)大學(xué)海相儲層演化與油氣富集機(jī)理教育部重點實驗室;頁巖氣資源戰(zhàn)略評價國土資源部重點實驗室;西安石油大學(xué)地球科學(xué)與工程學(xué)院;
【基金】:國家自然科學(xué)基金項目(41372139、41072098) 國家科技重大專項專題(2011ZX05018-001-002、2011ZX05009-002-205、2011ZX05033-004)
【分類號】:P618.13
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