發(fā)布時(shí)間：2018-10-26 08:10

【摘要】：致密砂巖儲(chǔ)層具有低孔低滲的特點(diǎn),單井基本無(wú)自然產(chǎn)能,必須通過(guò)壓裂改造等措施才能獲得工業(yè)氣流。然而常規(guī)壓裂往往效果不理想,需要采用新的壓裂技術(shù)才能滿足要求。近幾年發(fā)展起來(lái)的體積壓裂技術(shù)是致密砂巖儲(chǔ)層開(kāi)發(fā)的重要技術(shù)之一。儲(chǔ)層改造體積是用來(lái)評(píng)價(jià)致密砂巖體積壓裂后產(chǎn)能的重要參數(shù),儲(chǔ)層改造體積的大小決定了壓裂后的增產(chǎn)效果。目前國(guó)內(nèi)外對(duì)于儲(chǔ)層改造體積的計(jì)算方法研究較少、不夠系統(tǒng),致密砂巖體積壓裂產(chǎn)能的計(jì)算也基本是參考常規(guī)壓裂的計(jì)算方法,沒(méi)有充分考慮儲(chǔ)層改造體積的影響。本文在充分調(diào)研文獻(xiàn)的基礎(chǔ)上,以離散裂縫網(wǎng)絡(luò)模型(DFN)為基礎(chǔ),考慮致密砂巖儲(chǔ)層物性和壓裂施工參數(shù),建立了計(jì)算儲(chǔ)層改造體積的物理模型和數(shù)學(xué)模型,并以此為基礎(chǔ)開(kāi)發(fā)了體積壓裂儲(chǔ)層改造體積計(jì)算程序。運(yùn)用該程序研究分析了縱橫比、壓裂時(shí)間、綜合濾失系數(shù)、儲(chǔ)層厚度、水平主應(yīng)力差、有效彈性模量對(duì)儲(chǔ)層改造體積的影響規(guī)律,并以改造體積為目標(biāo)對(duì)壓裂施工參數(shù)進(jìn)行優(yōu)化設(shè)計(jì);在儲(chǔ)層改造體積物理模型的基礎(chǔ)上,建立了致密砂巖復(fù)雜縫網(wǎng)產(chǎn)能的物理模型,考慮裂縫的復(fù)雜性,推導(dǎo)了致密砂巖復(fù)雜縫網(wǎng)的產(chǎn)能公式,研究了裂縫條數(shù)、裂縫長(zhǎng)度、裂縫導(dǎo)流能力、次生裂縫形態(tài)、儲(chǔ)層滲透率、儲(chǔ)層厚度等對(duì)產(chǎn)能的影響,應(yīng)用正交試驗(yàn)分析法和灰色關(guān)聯(lián)理論研究了多因素對(duì)致密砂巖體積壓裂水平井產(chǎn)能的影響以及影響程度的主次關(guān)系,并對(duì)裂縫參數(shù)進(jìn)了優(yōu)化計(jì)算。研究成果對(duì)致密砂巖體積壓裂工藝參數(shù)優(yōu)選具有一定的參考價(jià)值。
[Abstract]:The tight sandstone reservoir has the characteristics of low porosity and low permeability, and the single well has no natural productivity, so it is necessary to obtain industrial airflow through fracturing and other measures. However, the effect of conventional fracturing is often not satisfactory, and new fracturing techniques are needed to meet the requirements. The volume fracturing technology developed in recent years is one of the important technologies in the development of tight sandstone reservoir. Reservoir reconstruction volume is an important parameter to evaluate the productivity of tight sandstone after fracturing, and the size of reservoir reconstruction volume determines the effect of increasing production after fracturing. At present, there is little research on the calculation method of reservoir reconstruction volume at home and abroad, and the calculation of volume fracturing productivity of tight sandstone is basically referring to the conventional fracturing calculation method, and the effect of reservoir reconstruction volume is not fully considered. On the basis of full investigation and research, based on discrete fracture network model (DFN) and considering the physical properties of tight sandstone reservoir and fracturing operation parameters, the physical and mathematical models for calculating the volume of reservoir reconstruction are established in this paper. Based on this, the volume calculation program of volume fracturing reservoir is developed. The effects of aspect ratio, fracturing time, comprehensive filtration coefficient, reservoir thickness, horizontal principal stress difference and effective modulus of elasticity on the volume of reservoir reconstruction are studied and analyzed by using this program. And the optimized design of fracturing parameters is carried out with the reconstruction volume as the target. Based on the physical model of reservoir reconstruction volume, the physical model of complex fracture network productivity of tight sandstone is established. Considering the complexity of fracture, the productivity formula of complex fracture network of tight sandstone is derived, and the number of fractures and the length of fracture are studied. The effects of fracture conductivity, secondary fracture morphology, reservoir permeability and reservoir thickness on productivity, The influence of multiple factors on the productivity and the primary and secondary relationship of the influence degree of the horizontal well of compact sandstone volume fracturing are studied by using orthogonal test analysis and grey correlation theory, and the fracture parameters are optimized. The research results have certain reference value for optimizing the parameters of bulk fracturing of tight sandstone.
【學(xué)位授予單位】：中國(guó)石油大學(xué)(華東)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：TE377;TE328

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 王南;裴玲;雷丹鳳;曾博;;中國(guó)非常規(guī)天然氣資源分布及開(kāi)發(fā)現(xiàn)狀[J];油氣地質(zhì)與采收率;2015年01期

2 蘇玉亮;王文東;周詩(shī)雨;李曉慧;慕立俊;魯明晶;盛廣龍;;體積壓裂水平井三線性流模型與布縫策略[J];石油與天然氣地質(zhì);2014年03期

3 魏子超;綦殿生;孫兆旭;許蘭婷;;體積壓裂技術(shù)在低孔致密油藏的應(yīng)用[J];油氣井測(cè)試;2013年04期

4 李琴;陳程;荀小全;;低滲致密氣藏壓裂水平井產(chǎn)能預(yù)測(cè)新方法[J];天然氣地球科學(xué);2013年03期

5 楊朝蓬;高樹(shù)生;郭立輝;熊偉;葉禮友;謝昆;;致密砂巖氣藏應(yīng)力敏感性及其對(duì)產(chǎn)能的影響[J];鉆采工藝;2013年02期

6 陳汾君;湯勇;劉世鐸;劉成川;李華昌;;低滲致密氣藏水平井分段壓裂優(yōu)化研究[J];特種油氣藏;2012年06期

7 曾凡輝;郭建春;何頌根;曾立軍;;致密砂巖氣藏壓裂水平井裂縫參數(shù)的優(yōu)化[J];天然氣工業(yè);2012年11期

8 馬新華;賈愛(ài)林;譚健;何東博;;中國(guó)致密砂巖氣開(kāi)發(fā)工程技術(shù)與實(shí)踐[J];石油勘探與開(kāi)發(fā);2012年05期

9 李建忠;郭彬程;鄭民;楊濤;;中國(guó)致密砂巖氣主要類型、地質(zhì)特征與資源潛力[J];天然氣地球科學(xué);2012年04期

10 位云生;賈愛(ài)林;何東博;冀光;;致密氣藏分段壓裂水平井產(chǎn)能評(píng)價(jià)新思路[J];鉆采工藝;2012年01期

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本文編號(hào)：2295105