本文關(guān)鍵詞： 方差體 三維地震 水平切片 小斷層 陷落柱　出處：《西安科技大學(xué)》2015年碩士論文　論文類型：學(xué)位論文

【摘要】：隨著礦井綜合機械化開采程度的不斷提高,對煤礦勘探的要求日益精細化。三維地震勘探技術(shù)以其獨具的信息量大、分辨率高、控制網(wǎng)度密等優(yōu)點,成為探測小斷層及陷落柱等地質(zhì)體一種卓有成效的方法。方差體技術(shù)則充分利用了三維數(shù)據(jù)體對地下情況的反映,通過檢測地震道的局部不連續(xù)性,即可檢測出地層中存在的異常情況。因此在識別小斷層,陷落柱等地層不連續(xù)變化時,方差體技術(shù)使其更容易被識別,表現(xiàn)出了獨特的優(yōu)勢。本次研究中選取了兩個不同區(qū)域,利用方差體技術(shù)分別對小斷層和陷落柱開展解釋研究。首先,根據(jù)識別小斷層和陷落柱對分辨率的特殊要求,對地震資料進行了屬性空間重定義、真振幅恢復(fù)、反褶積、面元均化、隨機噪音衰減、三維偏移等處理,形成具有高分辨率的三維數(shù)據(jù)體,為提取高質(zhì)量的方差體數(shù)據(jù)打下基礎(chǔ)。通過分析對比選取時窗長度為10ms,相鄰道數(shù)為3道的乘法運算模式進行方差體數(shù)據(jù)提取,得到清晰可靠的方差體水平切片,并結(jié)合時間剖面分別對兩個區(qū)的小斷層和陷落柱進行解釋,結(jié)果如下:陽泉一礦共計查明陷落柱20個,其中可靠陷落柱15個,較可靠陷落柱5個;轉(zhuǎn)龍灣工區(qū)查明了三維勘查區(qū)內(nèi)落差大于等于5m的斷層4條,斷層落差均在8~13m范圍內(nèi),落差小于5m的斷層3條。為礦方安全高效生產(chǎn)提供了有力指導(dǎo)。
[Abstract]:With the development of comprehensive mechanized mining, the requirement of coal mine exploration is becoming more and more fine. The 3D seismic exploration technology has the advantages of large amount of information, high resolution, dense control network and so on. It has become an effective method for detecting geological bodies such as small faults and collapse columns. The variance volume technique makes full use of the reflection of 3D data bodies to underground conditions and detects the local discontinuity of seismic traces. We can detect the anomalies in the strata. Therefore, when we identify the discontinuous changes of the strata, such as small faults and collapse columns, the variance volume technique makes it easier to be identified, showing a unique advantage. In this study, two different regions are selected. The interpretation of small faults and subsided columns is studied by variance volume technique. Firstly, according to the special requirements of identifying the resolution of small faults and collapse columns, the attribute space redefinition, true amplitude recovery, deconvolution of seismic data are carried out. Surface homogenization, random noise attenuation, 3D migration, etc., to form a high resolution 3D data volume, In order to extract the high quality variance volume data, the variance volume data are extracted by comparing and comparing the multiplication mode with 10 msof window length and 3 adjacent channels, and the level slice of variance volume is clear and reliable. The results are as follows: a total of 20 collapse columns have been identified in Yangquan No. 1 mine, of which 15 are reliable collapse columns and 5 are more reliable subsidence columns; Four faults with a drop of more than 5 m have been found in Zhuan Longwan area. The fault drop is in the range of 813 m and 3 faults with a drop less than 5 m. It provides a strong guide for the safe and efficient production of the mine.
【學(xué)位授予單位】：西安科技大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TD82;P631.4

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本文編號：1494849