辽西葫芦岛东部表层调查方法比对实验

发布时间：2018-03-14 09:11

本文选题：微测井　切入点：小折射　出处：《吉林大学学报(地球科学版)》2017年02期 　论文类型：期刊论文

【摘要】：地震勘探中,近地表的不均匀性给激发、接收和静校正等工作带来较大困难。辽西葫芦岛东部地表地质条件复杂,浅表层速度及厚度差异大,表层调查工作直接影响到地下介质成像效果。为使该地区首次进行的地震勘探能够获取准确的静校正量数据、给井深设计提供依据、研究适合该区域的表层调查方法,同时为满足国家深部探测项目对实验方法比对研究的需求,结合小折射、地面微测井和井中微测井三种表层调查方法的工作原理,在该工区分别应用三种方法做同点比对实验,分析了不同调查方法的适用性及精确度。结果表明,三种方法得到的结果与岩性录井结果一致,均能有效探测高速层埋深,指导井深设计,其中:小折射成本较低,适合地面较平坦区段,虽然不够精细,但能够准确找到高速层,可用于井深设计或作为微测井方法的补充;地面微测井适合山高无水或者造山破碎带造成钻井严重漏水的地区,需要井中检波器与大地良好耦合;井中微测井最为精确,探测层位更为精细,能分辨更多层位,与岩性录井结果最接近,在静校正量获取方面具有明显优势。通过三种表层调查的比对,分析了不同方法的适用范围,为该工区选择合适的表层调查方法及方法参数选取提供依据,同时为其他地表复杂区域进行表层调查提供参考。
[Abstract]:In seismic exploration, the near surface inhomogeneity makes it difficult to excite, receive and static correction. The surface geological conditions in the eastern part of Huludao, western Liaoning Province, are complicated, and the velocity and thickness of shallow surface vary greatly. The surface survey directly affects the imaging effect of underground media. In order to make the first seismic exploration in this area obtain accurate static correction data and provide the basis for well depth design, the surface survey method suitable for this area is studied. At the same time, in order to meet the needs of the National Deep Exploration Project for the comparative study of experimental methods, combined with the working principles of three surface survey methods, small refraction, surface micrologging and in-well micrologging, three methods were used to do the same point comparison experiments in the working area. The applicability and accuracy of different investigation methods are analyzed. The results show that the results obtained by the three methods are consistent with those obtained by lithologic logging, which can effectively detect the buried depth of high speed formation and guide the design of well depth, among which the small refraction cost is relatively low. Suitable for flatter sections on the surface, although not precise enough to find high speed zones accurately, can be used for well depth design or as a supplement to micrologging methods; surface micrologging is suitable for areas where mountain height is water free or where serious water leakage is caused by orogenic breakage zones, It is necessary to have a good coupling between the geophone and the earth, and the micrologging in the well is the most accurate, the detection layer is more precise, and it can distinguish more layers, which is the closest to the lithologic logging results. Through the comparison of three kinds of surface survey, the application range of different methods is analyzed, which provides the basis for selecting suitable surface survey methods and method parameters in this work area. At the same time, it provides a reference for other surface complex areas to conduct surface survey.
【作者单位】：吉林大学仪器科学与电气工程学院;中国石油大学(北京)地球物理与信息工程学院;教育部地球信息探测仪器重点实验室;吉林大学地球科学学院;
【基金】：国家深部探测技术与实验研究专项SinoProbe-09-06(201311197,201011083) 高等学校博士学科点专项科研基金项目(20110061110053)~~
【分类号】：P631.4;P631.81

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