本文選題：蘇里格西區(qū) + 可動(dòng)水飽和度　； 參考：《中國(guó)科學(xué)院研究生院(滲流流體力學(xué)研究所)》2015年碩士論文

【摘要】：隨著全球經(jīng)濟(jì)的快速發(fā)展,油氣的消耗速度也在不斷的增加。因而,作為中國(guó)目前已發(fā)現(xiàn)的最大的天然氣氣田-位于鄂爾多斯盆地北部的蘇里格氣田受到越來(lái)越多的關(guān)注。蘇里格氣田儲(chǔ)層為低滲致密含水儲(chǔ)層,其主力儲(chǔ)層的開(kāi)發(fā)效果較差,本文在前人蘇里格西部區(qū)塊研究成果的基礎(chǔ)上,結(jié)合礦場(chǎng)生產(chǎn)資料、測(cè)井解釋數(shù)據(jù),對(duì)蘇西地區(qū)產(chǎn)水規(guī)律、主要產(chǎn)水層位的判斷以及射孔層位的選擇進(jìn)行綜合研究,取得了如下成果與認(rèn)識(shí)：(1)應(yīng)用核磁共振測(cè)試技術(shù)測(cè)量分析蘇里格氣藏多塊巖樣的孔隙結(jié)構(gòu)特征,統(tǒng)計(jì)所有蘇里格氣藏巖樣的核磁共振測(cè)試結(jié)果表明：蘇里格氣藏致密儲(chǔ)層主要發(fā)育小孔、中孔和微孔,大孔隙不發(fā)育。經(jīng)過(guò)多次實(shí)驗(yàn)研究,明確300psi的離心力最接近于致密砂巖氣藏成藏過(guò)程中的排驅(qū)壓力,因此在300psi離心條件下的含水飽和度值可以近似認(rèn)為是蘇里格氣藏的儲(chǔ)層原始飽和度值。選取蘇里格致密儲(chǔ)層具有代表性的巖樣在300psi離心力離心后的核磁共振測(cè)試結(jié)果顯示：氣藏致密儲(chǔ)層大孔喉少,主要發(fā)育微細(xì)孔喉,飽和巖樣在300psi離心力下僅能離心出少量水相,表明微細(xì)孔喉對(duì)液相控制作用強(qiáng)。(2)總結(jié)了氣井產(chǎn)水對(duì)產(chǎn)能的影響。通過(guò)對(duì)比蘇里格氣藏西北部三個(gè)氣站的見(jiàn)水前后的產(chǎn)能,可以看出,已見(jiàn)水氣井見(jiàn)水前產(chǎn)能較未見(jiàn)水氣井產(chǎn)能低,見(jiàn)水后產(chǎn)能快速遞減(年遞減率60%,全區(qū)20%),只有見(jiàn)水前的1/3～1/4,氣井產(chǎn)水對(duì)單井產(chǎn)能影響大。對(duì)比氣井當(dāng)前累計(jì)產(chǎn)氣量和最終累計(jì)產(chǎn)氣量,可以看出：氣井一旦見(jiàn)水,后續(xù)產(chǎn)氣能力弱,最終累產(chǎn)氣量小于經(jīng)濟(jì)極限產(chǎn)氣量(1400×104m3),最終累計(jì)產(chǎn)氣量只有未見(jiàn)水井累產(chǎn)氣量的20%～30%。(3)利用核磁共振技術(shù)測(cè)得巖心的束縛水飽和度,再結(jié)合室內(nèi)實(shí)驗(yàn)測(cè)得的巖心孔隙度值,擬合計(jì)算出束縛水飽和度與孔隙度的關(guān)系曲線,結(jié)合測(cè)井解釋數(shù)據(jù)計(jì)算出各個(gè)深度點(diǎn)的可動(dòng)水飽和度,并繪制出可動(dòng)水飽和度的縱向分布曲線。通過(guò)分析大量的可動(dòng)水飽和度的常規(guī)測(cè)井解釋結(jié)果與實(shí)際生產(chǎn)數(shù)據(jù),明確了儲(chǔ)層的可動(dòng)水飽和度越大,對(duì)應(yīng)氣井的產(chǎn)水量越大這一特點(diǎn),并且明確了氣井是否產(chǎn)水的可動(dòng)水飽和度臨界值為10%：建立了氣井的產(chǎn)水特征預(yù)測(cè)方法。(4)利用上述方法對(duì)已開(kāi)發(fā)井的產(chǎn)水層位進(jìn)行預(yù)測(cè),并指導(dǎo)射孔層位的選擇。在選擇射孔層位時(shí),應(yīng)當(dāng)綜合考慮可動(dòng)水飽和度、含氣飽和度、孔滲特征等影響因素,并根據(jù)可動(dòng)水飽和度測(cè)井解釋數(shù)據(jù),優(yōu)先射開(kāi)可動(dòng)水飽和度小于10%、含氣飽和度大于50%的儲(chǔ)層,以提高氣層的產(chǎn)氣能力,有效降低氣井的產(chǎn)水風(fēng)險(xiǎn)。(5)在此基礎(chǔ)之上繪制了蘇里格致密砂巖氣藏研究區(qū)塊的可動(dòng)水飽和度平面分布圖,進(jìn)而優(yōu)選出低產(chǎn)水風(fēng)險(xiǎn)區(qū),明確該區(qū)塊的主力儲(chǔ)層為盒8段和山1段。
[Abstract]:With the rapid development of the global economy, oil and gas consumption rate is also increasing.As a result, Sulige gas field, the largest gas field in China, located in the north of Ordos Basin, has attracted more and more attention.Sulige gas field reservoir is low permeability tight water cut reservoir, and its main reservoir's development effect is poor. Based on the research results of the western block of Sulige, combining with the field production data and logging interpretation data, this paper gives the water production law to the west of Jiangsu province.The judgment of the main water-producing layer and the selection of perforation layer are studied synthetically, and the following results and understandings are obtained. (1) the pore structure characteristics of many rock samples in Sulige gas reservoir are measured and analyzed by nuclear magnetic resonance (NMR) test technique.The results of nuclear magnetic resonance (NMR) measurements of all the samples of sullige gas reservoir show that the tight reservoir of Sulige gas reservoir mainly develops micropores, mesoporous and micropores, and the macropores are not developed.After many experiments, it is concluded that the centrifugal force of 300psi is the closest to the displacement pressure in the formation of tight sandstone gas reservoir, so the water saturation value under 300psi centrifugal condition can be approximately considered as the original saturation value of Sulige gas reservoir.The nuclear magnetic resonance (NMR) test results of the representative rock samples of Sulige tight reservoir after centrifugation by 300psi centrifugal force show that the gas reservoir has few large pore throats and mainly developed micro pore throats, and saturated rock samples can only centrifuge a small amount of water phase under the centrifugal force of 300psi.It shows that the micropore throat has a strong effect on liquid phase control. 2) the effect of gas well water production on productivity is summarized.By comparing the productivity of the three gas stations in the northwest of Sulige gas reservoir before and after water injection, it can be seen that the productivity of the gas wells that have already appeared is lower than that of the wells without water.The productivity decreases rapidly after water (annual decline rate is 60%, the whole area is 20%, only 1 / 3 / 1 / 4 of the water before water, gas well water production has a great impact on single well productivity.In contrast to the current cumulative gas production and the final cumulative gas production of gas wells, it can be seen that once the gas wells see water, the subsequent gas production capacity is weak.The final cumulative gas production is less than the economic limit gas production rate of 1400 脳 10 ~ 4 m ~ (3), and the final accumulative gas production is only 20% 30% of the cumulative gas production of no well.) the irreducible water saturation of the core is measured by nuclear magnetic resonance (NMR) technology, and the core porosity value measured by laboratory experiments is combined.The curve of relation between irreducible water saturation and porosity was calculated by fitting, and the movable water saturation at every depth point was calculated with log interpretation data, and the longitudinal distribution curve of movable water saturation was drawn.By analyzing a large number of conventional logging interpretation results and actual production data of movable water saturation, it is clear that the greater the movable water saturation of reservoir, the greater the water production of gas wells.It is determined that the critical value of movable water saturation of gas wells is 10: the prediction method of water production characteristics of gas wells is established. (4) using the above methods, the water producing zones of developed wells are predicted, and the selection of perforation layers is guided.In selecting the perforating layer, we should consider comprehensively the influence factors such as movable water saturation, gas saturation, porosity and permeability characteristics, and interpret the data according to the movable water saturation logging.In order to improve the gas production capacity of gas reservoir, the water saturation of movable water is less than 10, and the saturation of gas is more than 50%.On the basis of effectively reducing the water production risk of gas wells, the plane distribution map of movable water saturation of Sulige tight sandstone gas reservoir research block is drawn, and the low water production risk area is selected.It is clear that the main reservoirs in this block are Box 8 and Shan 1.
【學(xué)位授予單位】：中國(guó)科學(xué)院研究生院(滲流流體力學(xué)研究所)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：TE31

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本文編號(hào)：1742127