【摘要】：吉林油田為低壓、低孔、低滲油藏,隨著油田開發(fā)的不斷深入,常規(guī)的開采技術(shù)不能有效的改善低滲層,并且返排較困難,易造成油層二次污染。泡沫酸具有均勻布酸、優(yōu)先進(jìn)入油層、密度低、液柱壓力低、返排能力強(qiáng)、攜帶能力強(qiáng)、對(duì)地層傷害小、酸液有效作用距離長(zhǎng)、施工簡(jiǎn)單、經(jīng)濟(jì)效益高等特點(diǎn)。通過引進(jìn)制氮、注氮設(shè)備和泡沫發(fā)生器,開展了對(duì)氮?dú)馀菽霎a(chǎn)工藝技術(shù)的研究,并在油田現(xiàn)場(chǎng)得到了很好的驗(yàn)證,取得了明顯的增產(chǎn)效果和經(jīng)濟(jì)效益。吉林油氣田開發(fā)進(jìn)入中后期,油藏壓力降低,地層虧空漏失現(xiàn)象嚴(yán)重,給油田穩(wěn)產(chǎn)和增產(chǎn)帶來許多困難,吉林油田所采用的一些常規(guī)工藝措施遠(yuǎn)遠(yuǎn)不能滿足生產(chǎn)的需要。結(jié)合吉林油田的實(shí)際情況,目前,酸化主要存在著以下幾個(gè)問題:1、對(duì)于非均質(zhì)地層,酸液優(yōu)先進(jìn)入高滲層,使得低滲層不能得到有效改善;2、對(duì)于油水同層的地層,酸液會(huì)優(yōu)先進(jìn)入水層,使得酸化后含水迅速上升,油井產(chǎn)油量下降;3、對(duì)于低壓油井,酸化后殘酸返排困難,容易形成二次污染,影響酸化效果;把泡沫流體的特性與酸化液和壓裂液有效的結(jié)合起來,形成新的工作流體,可大大提高吉林油田的酸化、壓裂技術(shù)水平,整體提高措施的成功率和有效率。
[Abstract]:Jilin Oilfield is a low pressure, low porosity and low permeability reservoir. With the deepening of oil field development, conventional production technology can not effectively improve the low permeability layer, and it is difficult to return to discharge, which is easy to cause secondary pollution of the reservoir. Foam acid has the characteristics of uniform acid distribution, preferential entry into oil layer, low density, low liquid column pressure, strong drainage ability, strong carrying ability, small damage to formation, long effective action distance of acid liquid, simple construction and high economic benefit. Through the introduction of nitrogen production, nitrogen injection equipment and foam generator, the process technology of increasing production of nitrogen foam has been studied, and it has been well verified in the field of oil field, and obvious effect of increasing production and economic benefit have been obtained. In the middle and late stage of Jilin oil and gas field development, the reservoir pressure is reduced and the formation loss is serious, which brings many difficulties to the stable production and production increase of Jilin oil field. Some conventional technological measures adopted in Jilin oil field are far from meeting the needs of production. Combined with the actual situation of Jilin Oilfield, at present, there are the following problems in acidizing: (1) for heterogeneous formation, acid liquid first enters the high permeability layer, which makes the low permeability layer can not be effectively improved; (2) for the formation with the same layer of oil and water, the acid liquid will enter the water layer first, which makes the water cut rise rapidly after acidizing and the oil production of oil well decreases. 3. For low pressure oil wells, it is difficult to return residual acid after acidizing, which is easy to form secondary pollution and affect acidizing effect. Combining the characteristics of foam fluid with acidified fluid and fracturing fluid effectively to form new working fluid can greatly improve the acidizing and fracturing technical level of Jilin Oilfield, and improve the success rate and efficiency of the measures as a whole.
【學(xué)位授予單位】：東北石油大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：TE357.2

【參考文獻(xiàn)】

相關(guān)期刊論文 前2條

1 金光明;于建良;;泡沫驅(qū)油現(xiàn)狀與展望[J];科技信息;2008年30期

2 劉成;;泡沫壓裂和泡沫酸化技術(shù)在吐哈油田應(yīng)用的可行性分析[J];吐哈油氣;2000年02期

，

本文編號(hào)：2507613