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《儲(chǔ)集層巖石成分和結(jié)構(gòu)對(duì)孔隙特征及儲(chǔ)集物性的影響.ppt》由會(huì)員上傳分享,免費(fèi)在線閱讀,更多相關(guān)內(nèi)容在工程資料-天天文庫(kù)。
1、實(shí)習(xí)3儲(chǔ)集層巖石成分和結(jié)構(gòu)對(duì)孔隙特征及儲(chǔ)集物性的影響實(shí)習(xí)作業(yè)PPT展示小組成員:王波李昆侖代全齊高葉銘宮超一、碎屑巖儲(chǔ)集層巖石分類(lèi)及投點(diǎn)分析沉積環(huán)境石英(Q)長(zhǎng)石(F)巖屑(R)求和(S)石英相對(duì)分?jǐn)?shù)(Q/S)長(zhǎng)石相對(duì)分?jǐn)?shù)(F/S)巖屑相對(duì)分?jǐn)?shù)(R/S)巖石類(lèi)型礫石心灘38.0530.8121.7490.60.4199779250.3400662250.239955855礫石心灘31.612.650.594.70.3336853220.1330517420.5332629367緩流心灘38.9824.8218.3682.160.4744401170.3020934760.223466407
2、5分支河道68.82.62697.40.7063655030.0266940450.2669404527河道沙壩75.52.317.695.40.7914046120.0241090150.1844863733邊灘44.5822.816.6183.990.5307774740.2714608880.1977616385邊灘844.810.2990.8484848480.0484848480.1030303033分支河道46.9923.3112.9583.250.5644444440.280.1555555565分支河道56304900.6222222220.3333333330.04444
3、44444分支河道60306960.6250.31250.06254河口壩52.9824.158.9986.120.615188110.2804226660.1043892245河口壩32389790.4050632910.4810126580.1139240514遠(yuǎn)砂壩42.0214.66.7463.360.6631944440.2304292930.1063762635遠(yuǎn)砂壩20468740.270270270.6216216220.1081081084遠(yuǎn)砂壩40376830.4819277110.4457831330.0722891574天然堤35.5116.319.1460.960
4、.5825131230.2675524930.1499343835天然堤342910730.4657534250.3972602740.1369863015天然堤43258760.5657894740.3289473680.1052631584湖灘48.8422.748.5780.150.6093574550.2837180290.1069245175表1-1碎屑巖巖石分類(lèi)數(shù)據(jù)統(tǒng)計(jì)表根據(jù)表1-1的數(shù)據(jù)計(jì)算與統(tǒng)計(jì),結(jié)合砂巖分類(lèi)三角圖,我們利用grapher軟件將其投影到三角組分圖上進(jìn)行分析與對(duì)比。石英(Q)長(zhǎng)石(F)巖屑(R)碎屑巖儲(chǔ)集層的巖石類(lèi)型主要集中為長(zhǎng)石砂巖和巖屑長(zhǎng)石砂巖,成分主要包
5、括石英和長(zhǎng)石,巖屑的含量相對(duì)較少一些??紫抖忍钕段锪6戎兄捣诌x系數(shù)滲透率14.69.4305.23614.259.434.14.535135.30.2273.7279.814.65.24305.23614.255.2434.14.53514.82.60.2471.9971.312.74.60.1492.83981316.010.1762.398.31610.0921.832281516.750.1082.49810.2100.1091.5649.51640.1091.6949.51513.880.1622.524.28.8210.1731.850.10110.536.640.0723.29
6、.56.4260.1391.3535.38.5170.1212.0932.58.339.040.05649.86.3270.0611.99.57.8240.1011.828.112.719.850.0853.143二、針對(duì)砂巖的孔隙度、填隙物、滲透率、分選系數(shù)、粒度中值之間的相互關(guān)系及影響作用。由圖3-1可以看出填隙物隨孔隙度的增大表現(xiàn)出的是遞減的趨勢(shì),填隙物主要為充填在孔隙以及喉道內(nèi)的物質(zhì),其含量的增加必定導(dǎo)致孔隙度的降低。孔隙度(一)孔隙度與填隙物關(guān)系分析(二)滲透率與填隙物含量關(guān)系分析由圖3-2可以分析得出填隙物的增加導(dǎo)致滲透率逐漸降低,因?yàn)樘钕段镌蕉?,將?dǎo)致孔隙及喉道的堵塞,流體
7、粘滯阻力會(huì)大幅升高,所以會(huì)使?jié)B透率降低。(三)孔隙度與滲透率關(guān)系分析由圖3-3可以得出滲透率與孔隙度大致呈現(xiàn)出正相關(guān)的分布關(guān)系,孔隙度越大,孔隙間流體受到的粘滯阻力將越小,有利于流體的流動(dòng),則滲透率也相應(yīng)越高。(四)滲透率與分選系數(shù)關(guān)系分析由圖3-4中各點(diǎn)的分布可以看出分選系數(shù)的增高,滲透率越來(lái)越差,所以分選系數(shù)越小,即分選性越好,滲透率越高,因?yàn)榉诌x系數(shù)相對(duì)較好,孔隙之間的連通性越好,排驅(qū)壓力將越低,有利于孔滲的提高。