本文選題：煤層氣　切入點：膨脹收縮　出處：《煤田地質(zhì)與勘探》2017年01期 　論文類型：期刊論文

【摘要】：煤層滲透率變化受多種因素制約,其中有效應(yīng)力和煤吸附 解吸過程中煤基質(zhì)的膨脹/收縮是兩個主要因素。基于這兩方面影響因素,采用體積不變原理和MATCHSTICK模型,提出新的預(yù)測滲透率變化的模型,有效回避了經(jīng)典模型中使用不確定參數(shù)引起的滲透率模擬誤差問題。研究結(jié)果表明,滲透率隨煤層壓力的變化存在3種理論模型,煤層氣排采過程中,應(yīng)盡可能使得滲透率變化曲線呈現(xiàn)下降緩慢、抬升穩(wěn)定快速且增幅較大的趨勢。最后,通過與經(jīng)典的Palmer-Mansoori模型和Shi-Durucan模型的模擬對比,并利用現(xiàn)場實測數(shù)據(jù)進(jìn)行驗證,證明了本文推導(dǎo)模型的正確性和實用性。
[Abstract]:The change of coal permeability is restricted by many factors, among which the effect force and the expansion / shrinkage of coal matrix are two main factors. Based on these two factors, the volume invariant principle and MATCHSTICK model are adopted. A new model for predicting permeability change is proposed, which effectively avoids the problem of permeability simulation error caused by the use of uncertain parameters in the classical model. The results show that there are three theoretical models for the variation of permeability with the pressure of coal seam. In the process of coal bed methane production, the permeability change curve should be decreased slowly, the uplift is stable and fast and the increase is large. Finally, by comparing with the classical Palmer-Mansoori model and Shi-Durucan model, the permeability change curve should be decreased slowly. The correctness and practicability of the model are verified by the field measured data.
【作者單位】： 中國石油大學(xué)(北京)煤層氣研究中心;
【分類號】：TE312

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本文編號：1643424