【摘要】：針對(duì)崖城氣田鉆井過程中出現(xiàn)的油氣層損害等復(fù)雜情況,在綜合分析研究氣田預(yù)探井儲(chǔ)層巖心資料的基礎(chǔ)上,采用X射線衍射、滴定分析、PVT測(cè)試等方法,詳細(xì)描述了儲(chǔ)層構(gòu)造特征、溫度壓力特征、孔滲特征、流體特征及黏土礦物特征,同時(shí)通過速敏、水敏、酸敏、堿敏、應(yīng)力敏等敏感性試驗(yàn),系統(tǒng)評(píng)價(jià)了儲(chǔ)層潛在損害因素類型和敏感性程度。試驗(yàn)結(jié)果表明:儲(chǔ)層臨界流速為0.5 m L/min,為弱速敏;最低臨界礦化度為9 485.7 mg/L,具有中等程度的水敏損害;儲(chǔ)層巖心對(duì)鹽酸表現(xiàn)出中等偏弱酸敏,土酸則呈現(xiàn)為無敏感性;臨界p H值為9,儲(chǔ)層為弱堿敏;儲(chǔ)層存在弱的應(yīng)力敏感,臨界壓力在9~11 MPa。
[Abstract]:On the basis of comprehensive analysis and research on core data of gas field pre-exploration wells, X-ray diffraction, titration analysis and PVT test are adopted to solve the complicated situation of formation damage during drilling in Yacheng gas field. Reservoir structural characteristics, temperature and pressure characteristics, porosity and permeability characteristics, fluid characteristics and clay mineral characteristics are described in detail. At the same time, sensitivity tests such as speed sensitivity, water sensitivity, acid sensitivity, alkali sensitivity and stress sensitivity are carried out. The types and sensitivity of potential damage factors in reservoir are systematically evaluated. The experimental results show that the critical velocity of the reservoir is 0.5 mL / min, which is weakly sensitive, and the lowest critical salinity of 9 485.7 mg/L, has moderate water sensitivity damage. The reservoir core shows moderate weak acid sensitivity to hydrochloric acid, while soil acid shows no sensitivity; the critical pH value is 9, and the reservoir is weak alkali sensitive; the reservoir has weak stress sensitivity, and the critical pressure is 9 / 11 MPa..
【作者單位】： 長(zhǎng)江大學(xué)地球科學(xué)學(xué)院;
【分類號(hào)】：TE21

【參考文獻(xiàn)】

相關(guān)期刊論文 前7條

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本文編號(hào)：2474016