本文以焉耆盆地四十里城地区为例,应用采集设计软件,以实际资料分析为基础,论述面元的选取和观测系统的均匀性,研究通过提高横向分辨率,在属性切片上识别深层"岩性-隐蔽圈闭"地质目标的采集技术。

The exploration of oil and gas in Baiqiu Area of Nanyang Depression was to search for lithologic and structural reservoirs,the lateral resolution and the signal-to-noise ratio of seismic data were highly required.By theoretical research on the seismic wave propagation property under the complex media conditions,and guiding by wave equation and others new design technologic theory,a 3-D observation system with high accuracy was quantitatively evaluated,and based on the geological requirements,it was designed accurately and the parameters were demonstrated.Under complex media conditions,an observation system is designed according to the wave equation forward simulation and the surface demonstration,which could meet the requirements of the pre-stack migration treatment and lithologic interpretation at the initial stage of data acquisition design for a high precision of 3D seismic exploration in the area.The acquisition footprint is reduced for the purpose of improving imaging precision.Seeing from the data acquisition profile in the area,the wave combination property is obvious,fault plain is clear high signal-to-noise ratio and the new acquisition data can meet the research demands of the structures of the fault block groups.

There existed 2 sets of coal seams on the top of Jurassic sedimentary strata in Yining Depression of Yili Basin,where multiples were well developed and interfered each other with underlying reflection planes.It greatly impacted the quality of the target zones.Based on forward modeling,it presented a new design method of seismic acquisition geometry to suppress multiple wave interference.It could improve the energy of seismic wave and the signal-to-noise ratio of the deep reflection.The result shows that changing the acquisition parameters,i.e.reducing the receiver interval,increasing the spread length and improving the fold are favorable for suppressing the time difference between the primaries and multiples and improving signal to noise ratio of deep reflection.

本文以王集小断块油田为主要研究对象,以石油地质学和测井学作为理论基础,从岩心实验、试油资料、测井资料入手,对可能引起低阻因素进行分析[1],揭示本地区低阻油层成因的主要控制因素和次要因素.得出环境因素、岩性、油层厚度、地层水矿化度、孔隙结构是形成低阻油层的主要原因.而泥质成分、含油高度是形成低阻油层的次要原因.

Donghe sand rock is the main exploration layer bearing oil and gas northern Tarim basin. Donghe sand rock was denuded in different degrees for suffering multi-term movement. Studied results show that the impedance of Donghe sand rock is higher than that of covering layer. Applying seismic and log data information transform an amplitude section transformed to an impedance section. Promoting vertical distinction recognizes thin reservoir. Based on spectrum image technology, the relation between the variation of thickness and the frequency tuning is analyzed by scanning seismic data; the frequency response characteristic can be determined. Then, the spectrum energy can be tracked along the reservoir after determining the best tuning frequency. Finally, the thickness of Donghe sand rock is calculated in connection with lithologic interpretation by using frequency resolution. Compared with the result of seismic integrated interpretation, spectrum imaging and impe-dence inversion have better effect in predicting thin reservoir.

通过地层细分对比-沉积微相分析、储层评价等研究工作,搞清了泌阳凹陷安棚深层系低孔、低渗储层的纵、横向展布规律,落实了深层系的储集特征,明确了原油储集有利相带,为该区的二次勘探提供了地质依据,使该区深层系新增探明石油地质储量790× 104t.