本文選題：致密砂巖儲(chǔ)層　切入點(diǎn)：物性下限　出處：《天然氣地球科學(xué)》2017年02期 　論文類型：期刊論文

【摘要】：成藏物性下限研究可為致密砂巖儲(chǔ)層的含油有效性評(píng)價(jià)提供重要參數(shù),可為資源潛力較大的鄂爾多斯盆地致密油勘探發(fā)現(xiàn)提供重要指導(dǎo)。運(yùn)用錄井、測(cè)井、試油試采、物性、壓汞、流體包裹體、鑄體薄片、掃描電鏡等資料,綜合確認(rèn)了鄂爾多斯盆地陜北斜坡東南部長(zhǎng)7段有效儲(chǔ)層物性下限和油氣的關(guān)鍵成藏時(shí)期,進(jìn)一步對(duì)現(xiàn)今有效儲(chǔ)層物性下限進(jìn)行關(guān)鍵成藏時(shí)期以來(lái)成巖作用對(duì)物性的改變量校正,得到了研究區(qū)長(zhǎng)7段致密砂巖油氣成藏物性下限。結(jié)果表明,研究區(qū)長(zhǎng)7段有效儲(chǔ)層孔隙度下限為5.0%,滲透率下限為0.038×10~(-3)μm~2;關(guān)鍵成藏時(shí)期主要為早白堊世中晚期,關(guān)鍵成藏時(shí)期與現(xiàn)今時(shí)期儲(chǔ)層物性存在較大差異,研究區(qū)Ⅳ_a型、Ⅳ_n型、Ⅴ型3種儲(chǔ)層類型在2個(gè)時(shí)期的物性差異大小平均值分別為5.15%、3.46%、2.32%;研究區(qū)Ⅳ_b型、Ⅴ型儲(chǔ)層的物性大小多分布在現(xiàn)今有效儲(chǔ)層物性下限值附近,這2種儲(chǔ)層類型的關(guān)鍵成藏與現(xiàn)今時(shí)期孔隙度相差平均為2.79%,進(jìn)而得到研究區(qū)長(zhǎng)7段致密砂巖油氣成藏孔隙度下限約為7.79%、成藏滲透率下限約為0.10×10~(-3)μm~2。
[Abstract]:The study on the lower limit of physical properties of reservoir formation can provide important parameters for evaluating the oil-bearing effectiveness of tight sandstone reservoir, and provide important guidance for exploration and discovery of tight oil in Ordos Basin with great resource potential. Mercury injection, fluid inclusions, thin sections of casting, scanning electron microscopy and other data have comprehensively confirmed the lower limit of effective reservoir properties and the key oil and gas accumulation period of the 7 member of the southeastern part of the North Shaanxi slope in Ordos Basin. The lower limit of physical properties of present effective reservoir is further corrected by diagenesis since the key reservoir forming period, and the lower limit of hydrocarbon reservoir formation of tight sandstone in the study area of Chang7 formation is obtained. The lower limit of effective reservoir porosity and permeability of Chang7 formation are 5.0 and 0.038 脳 10 ~ (-3) 渭 m ~ (-2) 渭 m ~ (-2) respectively. The key reservoir forming period is mainly the middle and late early Cretaceous, and the key reservoir forming period is different from that of present period. The average values of the physical properties of the three types of reservoirs in the two periods are 5.153.46 and 2.32.The physical properties of the reservoirs of type 鈪，

本文編號(hào)：1644275