the attrition of electric energy is an important quaky of electrical enterprise ,and it is a synthetical image about the level of network planning, technical management, network running and management. At the moment of energy shortage, Saving energy and reducing consumption is an important national policy, reinforcement the manage of line attrition, decreasing the breakage of network are important to lift the economic benefit of electrical enterprise. so we analysis the reason of line lose, and propose a few ways to decrease the lose.

地层特性通常有很强的方位性,因此,必须进行三维测量才能提供完整的描述.三维声波,能提供轴向、周向、径向三个方向上的测井数据.轴向、周向的探测分辨率进一步提高,能更精细地描述近井眼地层信息;径向探测深度的提高,能更好地获取原状地层信息,在能为取心、射孔提供更准确依据的同时,还能有效地判断出地层断面及裂缝发育走向,并且也为声波过套管测井提供了可行性依据.

Crosswell seismic,as a bridge between logging data and seismic data,which improves the comprehensive interpretation,and allows us to have reliable data to support interpretation on any scale.However,whether domestic or foreign,crosswell seismic equipment,especially the source,is still the bottleneck of crosswell seismic technology.If the stimulative performance of seismic source fails to meet requirements,the collected data cannot be a true reflection of the measured formation information,measurement would be meaningless.The characteristic analysis of seismic source recent in high frequency uses is done,in order to select suitable source in the next work.

Based on the outcrop features and conventional petrophysical properties,the reservoir characteristics of T1j2 of Zhaigouwan structure in eastern Sichuan are studied.The result shows that the reservoir rocks are mainly composed of crystal grain dolomite and particle dolomite.The reservoir spaces are mainly intercrystal pores and dissolved pores. The reservoir properties are poor.The reservoir types are fracture-pore and pore-fracture.Reservoirs mainly developed in T1j22 along longititudinal direction,less in T1j21 and partly in T1j23.Reservoirs of T1j22 developed well in Zhaigou 2 well and Zhaigou 4 well,while reservoirs of T1 j21 developed well in Zhaigou 4 well.Sedimentation not only controls the development and distribution of reservoir,but also affects the basic pattern of reservoir and the type and intensity of diagenesis.It is the dominated factor controlling the reservoir development.Diagenesis determines the reservoir space and reservoir performance,and directly influences the forming and evolution of pore space.Tectonism provides conditions for the above activities.

There are many source rocks developed at South Poyang Depression, mainly including the Upper Permian Longtan Formation of dead color mudstone and coal, the Lower Permian Maokou Formation of marl and the Lower Permian Xixia Formation of limestone. Integrated barkinite and vitrinite in coal, a hydrocarbon-generating simulation was carried out and a hydrocarbon-generating potential was explored for the main source rocks in this study area. These results illustrate that either barkinite or vitrinite are of very strong potential, in which an oil generation of barkinite is much stronger than that of vitrinite. As for Maokou and Longtan formations, a hydrocarbon-generating intensity in mud source rock shows that the maximum occurs at southwestern depression and a decrease trend appears from north to east. Additionally, the thickness of source rock at southwestern depression is the largest, reflecting the southwestern depression is a favorable exploration area.