勝坨28斷塊東一、東二段開發(fā)特征及剩余油評價
發(fā)布時間：2018-09-01 07:34
【摘要】：勝坨油田現(xiàn)已進(jìn)入特高含水開發(fā)后期,儲采矛盾十分突出,開發(fā)現(xiàn)狀呈現(xiàn)出低采油速度、低采出程度、高含水的“兩低一高”特征。因此,迫切需要對油田各儲層進(jìn)行綜合研究。坨28斷塊位于東營凹陷北部,為一被斷層切割復(fù)雜化的穹隆背斜,地層為河流相碎屑巖正旋回沉積;儲層物性屬于高孔、高滲儲層;層間和層內(nèi)非均質(zhì)性不強(qiáng),而平面非均質(zhì)性較強(qiáng);東一、東二段地下原油粘度較高,均屬稠油油藏,有正常的溫度壓力系統(tǒng)。開發(fā)矛盾主要有:井網(wǎng)密度小,單井控制儲量大;原油粘度大,含水上升速度快,注水開發(fā)見效不明顯;注采對應(yīng)率低,驅(qū)替不均衡等。本文針對坨28斷塊的地質(zhì)特征和開發(fā)現(xiàn)狀,首先在地質(zhì)研究成果的基礎(chǔ)上,對工區(qū)地層特征、沉積相、斷裂系統(tǒng)、儲層非均質(zhì)性、油層發(fā)育特征及流體性質(zhì)進(jìn)行深入的分析及評價。以小層油砂體為單位,經(jīng)核實(shí)儲量參數(shù),進(jìn)行地質(zhì)儲量的復(fù)算。然后,通過對油藏生產(chǎn)現(xiàn)狀、能量狀況、注水受效狀況等進(jìn)行開發(fā)特征分析;通過水驅(qū)特征曲線法、產(chǎn)量遞減法、累積曲線法等多種油藏工程方法,對可采儲量及采收率進(jìn)行預(yù)測,并進(jìn)行開發(fā)特征評價。通過研究分析累積產(chǎn)量曲線特征,提出理想可采儲量的概念,即油藏按照目前開發(fā)生產(chǎn)狀況,直到產(chǎn)量遞減為零時的理想最大可采儲量。當(dāng)油藏產(chǎn)量遞減到經(jīng)濟(jì)極限產(chǎn)量時油藏將報廢,這部分的累計(jì)產(chǎn)量為經(jīng)濟(jì)極限可采儲量,即通常所說的可采儲量。從經(jīng)濟(jì)極限產(chǎn)量遞減到零的這部分累計(jì)產(chǎn)量則為非經(jīng)濟(jì)可采儲量。因此,理想可采儲量由經(jīng)濟(jì)極限可采儲量和非經(jīng)濟(jì)可采儲量兩部分組成,其反映了油井的生產(chǎn)能力大小,比較適用于油井產(chǎn)能的評價。另外,理想可采儲量與地質(zhì)及工程因素有關(guān),當(dāng)儲量越大、物性越好、注采越完善,則理想可采儲量越大。經(jīng)研究,理想可采儲量大于經(jīng)濟(jì)極限可采儲量,并且兩者呈清晰的直線比例關(guān)系。本文主要通過計(jì)算單井剩余可采儲量,來得到坨28斷塊東一、東二段剩余油平面分布,明確了該區(qū)剩余油挖潛的目標(biāo)井區(qū)。運(yùn)用聚類分析將研究區(qū)所有井的剩余可采儲量與含水率進(jìn)行分類。通過逐井小層產(chǎn)量劈分,計(jì)算和預(yù)測了各井各小層的剩余可采儲量,從而明確了剩余油富集的主力挖潛層位。最后,對典型小層進(jìn)行了剩余油成因類型的分析,主要劃分了井網(wǎng)控制不住、井間滯留區(qū)、注采不完善、層間干擾這4類主要的剩余油成因類型,并繪制了剩余油成因類型分布圖,最后有針對性地提出了剩余油挖潛目標(biāo)和井位措施,提供生產(chǎn)參考。
[Abstract]:Shengtuo Oilfield has entered the late stage of super high water cut development, and the contradiction of storage and production is very prominent. The present situation of development presents the characteristics of "two low and one high" with low oil production rate, low production degree and high water cut. Therefore, there is an urgent need for comprehensive study of each reservoir in the oil field. Tuo 28 fault block is located in the northern part of Dongying sag. It is a complicated dome anticlastic anticlase with fault cutting. The strata are fluvial clastic rock positive cycle deposition, the reservoir physical property belongs to high porosity and high permeability reservoir, and the heterogeneity between layers and layers is not strong. However, the plane heterogeneity is strong, and the underground crude oil in the first and second member of the eastern part is of high viscosity, which belongs to the heavy oil reservoir and has a normal temperature and pressure system. The main development contradictions are as follows: small density of well pattern, large controlled reserves of single well, high viscosity of crude oil, fast rise speed of water cut, low corresponding rate of injection and production, uneven displacement and so on. In this paper, according to the geological characteristics and development status of Tuo 28 fault block, the stratigraphic characteristics, sedimentary facies, fault system and reservoir heterogeneity in the working area are analyzed on the basis of geological research results. The characteristics of reservoir development and fluid properties are analyzed and evaluated in depth. Taking the small oil sand body as the unit, the reserve parameters are verified and the geological reserves are recalculated. Then, through the analysis of development characteristics of reservoir production status, energy status, water injection efficiency, and other reservoir engineering methods, such as water drive characteristic curve method, production decline method, cumulative curve method and so on, The recoverable reserves and oil recovery are predicted and the development characteristics are evaluated. By studying and analyzing the characteristics of cumulative production curve, the concept of ideal recoverable reserves is put forward, that is, the ideal maximum recoverable reserves of reservoirs developed according to the present production conditions until the production decline to 00:00. When the reservoir production decreases to the economic limit, the reservoir will be abandoned. The cumulative production of this part is the economic limit recoverable reserves, that is, the recoverable reserves. The cumulative production from economic limit to zero is non-economic recoverable reserves. Therefore, the ideal recoverable reserves are composed of two parts: economic limit recoverable reserves and non-economic recoverable reserves, which reflect the production capacity of oil wells and are more suitable for the evaluation of oil well productivity. In addition, the ideal recoverable reserves are related to geological and engineering factors. The larger the reserves, the better the physical properties and the more perfect the injection and production, the larger the ideal recoverable reserves. The results show that the ideal recoverable reserves are larger than the economic limit recoverable reserves, and the relationship between them is linear. In this paper, by calculating the remaining recoverable reserves of single well, we can get the distribution of the remaining oil in the first and second sections of Tuo 28 fault block, and the target well area for tapping the potential of remaining oil in this area is determined. The remaining recoverable reserves and water cut of all wells in the study area are classified by cluster analysis. The remaining recoverable reserves of each well are calculated and predicted by dividing the production of each well into small layers, and the main potential layer of remaining oil enrichment is determined. Finally, the genetic types of residual oil in typical sub-layers are analyzed. The four main types of residual oil are divided into four main types, which are uncontrollable well pattern, interwell retention zone, imperfect injection and production, interlayer interference, etc. The distribution map of the genetic types of residual oil is plotted. Finally, the target of tapping potential of remaining oil and the measures of well location are put forward in order to provide a reference for production.
【學(xué)位授予單位】：成都理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TE327
本文編號：2216536
[Abstract]:Shengtuo Oilfield has entered the late stage of super high water cut development, and the contradiction of storage and production is very prominent. The present situation of development presents the characteristics of "two low and one high" with low oil production rate, low production degree and high water cut. Therefore, there is an urgent need for comprehensive study of each reservoir in the oil field. Tuo 28 fault block is located in the northern part of Dongying sag. It is a complicated dome anticlastic anticlase with fault cutting. The strata are fluvial clastic rock positive cycle deposition, the reservoir physical property belongs to high porosity and high permeability reservoir, and the heterogeneity between layers and layers is not strong. However, the plane heterogeneity is strong, and the underground crude oil in the first and second member of the eastern part is of high viscosity, which belongs to the heavy oil reservoir and has a normal temperature and pressure system. The main development contradictions are as follows: small density of well pattern, large controlled reserves of single well, high viscosity of crude oil, fast rise speed of water cut, low corresponding rate of injection and production, uneven displacement and so on. In this paper, according to the geological characteristics and development status of Tuo 28 fault block, the stratigraphic characteristics, sedimentary facies, fault system and reservoir heterogeneity in the working area are analyzed on the basis of geological research results. The characteristics of reservoir development and fluid properties are analyzed and evaluated in depth. Taking the small oil sand body as the unit, the reserve parameters are verified and the geological reserves are recalculated. Then, through the analysis of development characteristics of reservoir production status, energy status, water injection efficiency, and other reservoir engineering methods, such as water drive characteristic curve method, production decline method, cumulative curve method and so on, The recoverable reserves and oil recovery are predicted and the development characteristics are evaluated. By studying and analyzing the characteristics of cumulative production curve, the concept of ideal recoverable reserves is put forward, that is, the ideal maximum recoverable reserves of reservoirs developed according to the present production conditions until the production decline to 00:00. When the reservoir production decreases to the economic limit, the reservoir will be abandoned. The cumulative production of this part is the economic limit recoverable reserves, that is, the recoverable reserves. The cumulative production from economic limit to zero is non-economic recoverable reserves. Therefore, the ideal recoverable reserves are composed of two parts: economic limit recoverable reserves and non-economic recoverable reserves, which reflect the production capacity of oil wells and are more suitable for the evaluation of oil well productivity. In addition, the ideal recoverable reserves are related to geological and engineering factors. The larger the reserves, the better the physical properties and the more perfect the injection and production, the larger the ideal recoverable reserves. The results show that the ideal recoverable reserves are larger than the economic limit recoverable reserves, and the relationship between them is linear. In this paper, by calculating the remaining recoverable reserves of single well, we can get the distribution of the remaining oil in the first and second sections of Tuo 28 fault block, and the target well area for tapping the potential of remaining oil in this area is determined. The remaining recoverable reserves and water cut of all wells in the study area are classified by cluster analysis. The remaining recoverable reserves of each well are calculated and predicted by dividing the production of each well into small layers, and the main potential layer of remaining oil enrichment is determined. Finally, the genetic types of residual oil in typical sub-layers are analyzed. The four main types of residual oil are divided into four main types, which are uncontrollable well pattern, interwell retention zone, imperfect injection and production, interlayer interference, etc. The distribution map of the genetic types of residual oil is plotted. Finally, the target of tapping potential of remaining oil and the measures of well location are put forward in order to provide a reference for production.
【學(xué)位授予單位】：成都理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TE327
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