發(fā)布時(shí)間：2018-06-16 07:17

  本文選題：資陽地區(qū) + 觀測(cè)系統(tǒng)設(shè)計(jì)�。� 參考：《西南石油大學(xué)》2016年碩士論文

【摘要】：川南資陽丹山-石湍(東峰場(chǎng))石油天然氣勘查區(qū)塊位于四川盆地川西南坳陷的西北部,其構(gòu)造處于威遠(yuǎn)大型穹窿背斜構(gòu)造東北部的威遠(yuǎn)高陡構(gòu)造帶與高石梯-磨溪低緩構(gòu)造帶之間的緩坡帶內(nèi),地震解釋在龍王廟組、燈影組、茅口組都見明顯“灘相地震反射特征”及明顯“亮點(diǎn)”反射特征,與鄰區(qū)已知磨溪及高石梯氣藏反射特征類似,磨溪及高石梯在海相下組合已取得重大油氣發(fā)現(xiàn),預(yù)示本區(qū)海相下組合具有良好的勘探前景。區(qū)內(nèi)僅實(shí)施了二維地震勘探,以往主要勘探目的層為三疊系須家河組,造成海相下組合地層信噪比較低,不能滿足海相下組合巖性勘探要求,為了實(shí)現(xiàn)該區(qū)海相碳酸鹽巖地層油氣勘探的戰(zhàn)略性突破,進(jìn)行該區(qū)采集技術(shù)的研究是十分必要。通過對(duì)川中資陽地區(qū)以前采集時(shí)所用的觀測(cè)系統(tǒng)、激發(fā)因素、接收因素以及地震資料分析、研究的基礎(chǔ)上,以獲取高品質(zhì)的地震資料完成該地區(qū)的地質(zhì)任務(wù)和采集要求為目標(biāo),通過觀測(cè)系統(tǒng)設(shè)計(jì)軟件設(shè)計(jì)較為適合該地區(qū)的觀測(cè)系統(tǒng)；針對(duì)不同的地形以及巖性進(jìn)行針對(duì)性的激發(fā)因素試驗(yàn)；開展數(shù)字檢波器及模擬檢波器接收因素試驗(yàn)。確定適合該地區(qū)地震采集的最佳激發(fā)因素和接收因素；通過資陽三維采集項(xiàng)目的實(shí)施,分析應(yīng)用效果,建立一套適合該地區(qū)針對(duì)主要勘探對(duì)象的地震采集技術(shù)。通過研究工作可以證實(shí)：1)采用18L4S (120+120) T1R108F束狀式觀測(cè)系統(tǒng)在該地區(qū)較大地提高了深層反射資料的疊加成像效果,達(dá)到提高資料品質(zhì)特別是分辨率和信噪比的目的。2)較為合適的激發(fā)因素,采用數(shù)學(xué)檢波器接收能在該地區(qū)復(fù)雜表層地質(zhì)條件下獲得信噪比較高、連續(xù)性較好、激發(fā)頻譜較寬的原始單炮記錄和監(jiān)控剖面。
[Abstract]:The oil and gas exploration block of Danshan-Shi turbulent (Dongfeng field) in Ziyang, southern Sichuan Basin, is located in the northwest of the southwest depression of Sichuan Basin. The structure is located in the gentle slope zone between the Weiyuan high and steep structural belt and the Gaoshitian-Moxi low gentle structural belt in the northeast of Weiyuan large dome anticline. The seismic interpretation is in Longwangmiao formation and Dengying formation. The Maokou formation shows obvious "beach seismic reflection characteristics" and obvious "bright spot" reflection characteristics, which are similar to those of the known Moxi and Gaositi gas reservoirs in the adjacent area. Major oil and gas discoveries have been made in the Moxi and Gaoshitian assemblages under the marine facies. It indicates that the marine assemblage in this area has a good prospect for exploration. Only 2-D seismic exploration has been carried out in this area. In the past, the main exploration target was the Xujiahe formation of Triassic system, which resulted in low signal-to-noise ratio (SNR) of the submarine assemblage, which could not meet the requirements of the submarine assemblage lithologic exploration. In order to realize the strategic breakthrough of oil and gas exploration in marine carbonate strata, it is necessary to study the acquisition technology in this area. Based on the analysis of the observation system, excitation factors, receiving factors and seismic data used in the previous acquisition in Ziyang area of central Sichuan, the aim is to obtain high quality seismic data to complete the geological tasks and acquisition requirements in this area. Through the design of the observation system software design is more suitable for the observation system in this area; aiming at different topography and lithology of the targeted excitation factor test; digital geophone and analog geophone receiving factor test. Through the implementation of the Ziyang 3D acquisition project and the analysis of the application effect, a set of seismic acquisition technology suitable for the main exploration objects in this area is established. It is proved by the research work that the beam observation system T1R108F using 18L4S / 120) T1R108F has greatly improved the superposition imaging effect of deep reflection data in this area. In order to improve the quality of data, especially the resolution and signal-to-noise ratio (SNR), the more suitable excitation factors are obtained. The receiver of mathematical geophone can obtain higher SNR and better continuity under the complicated surface geological conditions in this area. Original single shot recording and monitoring profile with wider excitation spectrum.
【學(xué)位授予單位】：西南石油大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2016
【分類號(hào)】：P618.13

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本文編號(hào)：2025858