本文選題：油氣藏　切入點(diǎn)：微地震監(jiān)測(cè)　出處：《電子科技大學(xué)》2016年碩士論文

【摘要】：微地震監(jiān)測(cè)技術(shù)在油氣藏資源開發(fā)中發(fā)揮著重要的作用。微地震監(jiān)測(cè)技術(shù)通過對(duì)已知觀測(cè)數(shù)據(jù)的分析,對(duì)微地震事件進(jìn)行定位,用以分析地下的形態(tài)結(jié)構(gòu)或指導(dǎo)油氣藏開發(fā)。微地震定位技術(shù)作為微地震監(jiān)測(cè)技術(shù)的核心部分,一直以來都是該領(lǐng)域研究的重點(diǎn)和難點(diǎn)�，F(xiàn)有的微地震定位方法定位精度低、實(shí)現(xiàn)效率差、生產(chǎn)成本高,無法滿足實(shí)際生產(chǎn)的需要。本文針對(duì)現(xiàn)有微地震定位方法的缺陷,提出一種基于交叉驗(yàn)證的速度模型自適應(yīng)調(diào)節(jié)的方法和一種廣義線性反演和源掃描結(jié)合的微地震定位方法。本文的主要工作如下:1.提出了一種基于交叉驗(yàn)證的速度模型自適應(yīng)調(diào)節(jié)的方法。高效準(zhǔn)確地構(gòu)建速度模型是提高微地震定位精度的先決條件。現(xiàn)有很多微地震定位方法都采用人工調(diào)節(jié)參數(shù)(如初始速度、模型參數(shù)等)的方式構(gòu)建速度模型,在效率和精度上都無法滿足實(shí)際生產(chǎn)的需求。為此,本文提出一種基于交叉驗(yàn)證的速度模型自適應(yīng)調(diào)節(jié)的方法,該方法每次選取不同的射孔點(diǎn)建立速度模型對(duì)剩余的射孔點(diǎn)進(jìn)行定位,重復(fù)多次,以定位誤差的倒數(shù)作為權(quán)重對(duì)所有組的參數(shù)進(jìn)行加權(quán)疊加,實(shí)現(xiàn)速度模型的自適應(yīng)調(diào)節(jié)。理論數(shù)據(jù)和實(shí)際數(shù)據(jù)結(jié)果表明經(jīng)過自適應(yīng)調(diào)節(jié)的速度模型可以得到較好的定位結(jié)果。2.提出了一種廣義線性反演和源掃描結(jié)合的微地震定位方法�，F(xiàn)有的微地震定位方法有兩類:廣義線性反演和源掃描。廣義線性反演實(shí)現(xiàn)速度快,對(duì)水平方向定位精度較高,但是對(duì)垂直方向定位效果不佳;源掃描法在三維空間上搜索能產(chǎn)生與觀測(cè)初至最相似的位置,定位精度相對(duì)較高但效率低下。本文提出廣義線性反演和源掃描法結(jié)合的微地震定位方法,該方法首先利用廣義線性反演對(duì)震源的水平方向位置求解,再利用源掃描法對(duì)震源的垂直方向位置求解,從而結(jié)合了兩種方法在效率和精度上的優(yōu)勢(shì),能高效地獲得高精度的微地震事件定位結(jié)果,通過實(shí)際數(shù)據(jù)測(cè)試驗(yàn)證了提出方法的有效性。綜上,本文利用交叉驗(yàn)證的方法實(shí)現(xiàn)了速度模型的自適應(yīng)調(diào)節(jié),高效準(zhǔn)確地構(gòu)建了速度模型;利用廣義線性反演和源掃描結(jié)合的微地震定位方法對(duì)微地震事件進(jìn)行定位,定位精度高,實(shí)現(xiàn)速度快。
[Abstract]:Microseismic monitoring technology plays an important role in the development of oil and gas reservoir resources.The microseismic monitoring technique can locate the microseismic events by analyzing the known observation data, which can be used to analyze the underground morphology and structure or to guide the development of oil and gas reservoirs.As the core of micro-seismic monitoring technology, micro-seismic location technology has been the focus and difficulty of this field.The existing micro-seismic localization methods have low positioning accuracy, low efficiency and high production cost, so they can not meet the needs of actual production.In this paper, a speed model adaptive adjustment method based on cross validation and a microseismic location method based on generalized linear inversion and source scanning are proposed to overcome the shortcomings of existing microseismic localization methods.The main work of this paper is as follows: 1.A speed model adaptive adjustment method based on cross-validation is proposed.Constructing velocity model efficiently and accurately is a prerequisite to improve the accuracy of micro-seismic location.At present, many micro-seismic localization methods use manual adjustment parameters (such as initial velocity, model parameters, etc.) to construct velocity model, which can not meet the demand of actual production in efficiency and precision.In this paper, a speed model adaptive adjustment method based on cross validation is proposed. Each time a different perforating point is selected to establish a velocity model to locate the remaining perforation points, the method is repeated many times.All the parameters of the group are weighted and superimposed with the reciprocal of the location error as the weight to realize the adaptive adjustment of the velocity model.The results of theoretical and practical data show that the adaptive speed model can get better localization results.A microseismic location method combining generalized linear inversion and source scanning is proposed.There are two kinds of microseismic localization methods: generalized linear inversion and source scanning.Generalized linear inversion is fast and accurate for horizontal orientation, but it is not good for vertical orientation. The source scanning method can search for the most similar position to the observed first arrival in three-dimensional space.The positioning accuracy is relatively high but the efficiency is low.In this paper, a micro-seismic location method combining generalized linear inversion and source scanning is proposed. In this method, the horizontal location of the source is first solved by generalized linear inversion, and then the vertical position of the source is solved by the source scanning method.Combining the advantages of the two methods in the efficiency and accuracy, the high precision micro-seismic event location results can be obtained efficiently, and the validity of the proposed method is verified by the actual data test.In summary, this paper realizes the adaptive adjustment of the velocity model by cross-validation, constructs the velocity model efficiently and accurately, and uses the micro-seismic location method combined with generalized linear inversion and source scanning to locate the micro-seismic events.The positioning accuracy is high and the speed is fast.
【學(xué)位授予單位】：電子科技大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2016
【分類號(hào)】：P631.4

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 劉雙慶;謝靜;王熠熙;;一種提高振動(dòng)源掃描算法信噪比的方法[J];華北地震科學(xué);2015年01期

2 鄭文衡;;仿真地震圖[J];地學(xué)前緣;2013年06期

3 金維浚;張衡;張文輝;段心標(biāo);劉偉;;微地震監(jiān)測(cè)技術(shù)及應(yīng)用[J];地震;2013年04期

4 王彩霞;白超英;王馨;;地震震相初至自動(dòng)檢測(cè)技術(shù)綜述[J];地球物理學(xué)進(jìn)展;2013年05期

5 何惺華;;基于三分量的微地震震源反演方法與效果[J];石油地球物理勘探;2013年01期

6 宋維琪;王新強(qiáng);高艷可;;地面監(jiān)測(cè)微地震事件等效速度反演定位方法[J];石油物探;2012年06期

7 苗小虎;姜福興;王存文;鄧建明;;微地震監(jiān)測(cè)揭示的礦震誘發(fā)沖擊地壓機(jī)理研究[J];巖土工程學(xué)報(bào);2011年06期

8 康紅普;;煤礦井下應(yīng)力場(chǎng)類型及相互作用分析[J];煤炭學(xué)報(bào);2008年12期

9 崔榮旺;;微地震壓裂監(jiān)測(cè)應(yīng)在井中進(jìn)行[J];大慶石油地質(zhì)與開發(fā);2007年04期

10 羅長(zhǎng)林;張正祿;鄧勇;梅文勝;陳本榮;;基于改進(jìn)的高斯-牛頓法的非線性三維直角坐標(biāo)轉(zhuǎn)換方法研究[J];大地測(cè)量與地球動(dòng)力學(xué);2007年01期

相關(guān)碩士學(xué)位論文 前1條

1 李海濤;多裂縫應(yīng)力干擾研究[D];西南石油大學(xué);2015年

，

本文編號(hào)：1711000