摘要
塔里木盆地地质情况复杂，油气类型多种多样，目前已在多套层系发现了凝析油气藏；利用常规测井资料解释评价油气层，能够有效地识别并确定油气层和水层的界限，但却无法区分气层还是油层，以及如何准确划分油、气界面。电缆重复地层测试测井通过测量地层压力，建立压力—深度剖面，根据其压力梯度变化估算出地层流体性质，划分油、气水界面；中子、密度测井测量的地层含氢指数与地层介质的电子密度指数由于氢元素的存在而体现了很好的相关性，利用该相关性质可以确定地层液体含量（孔隙度），识别流体类型；偶极横波成像测井提供了当今测量地层纵波、横波和斯通利波的最好方法，通过对全波的处理，可以提取大量的岩石机械特性，由于气层对纵横波速度的影响不同，因此可以利用纵横波速度比、泊松比来直观识别油气层，划分油、气界面。通过对以上测井方法基本理论的阐述，并在实例中应用新方法解决了常规测井资料无法解决的难题。研究结果表明，利用测井新技术、新思路，结合常规测井资料能够有效识别凝析气层，准确划分油气界面。
At present, the condensate reservoirs
have been found in multiple set strata in Talimu Basin with complicated geological conditions
and various types of reservoirs. By use of conventional log data to interpret and evaluate oil
and gas bearing formations, the limit of dividing the oil and gas bearing formations from
water formation can be effectively identified and determined, however, the gas bearing
formation can't be distinguished from the oil bearing formations and the gas oil interface can't
be accurately divided. In wireline multiple formation testing logging, the pressure depth plot
can be made through measuring formation pressures, then the formation fluid properties and
the oil water and gas water interfaces can be estimated according to the change in pressure
gradient; because of the existence of hydrogen element, a good corelativity may be found
between the formation hydrogen bearing index and the eletron density index of formation
medium, which are measured by neutron logging and density logging, and by use of such a
correlativity, the formation liquid content (porosity) may be determined and the liquid type can
be identified; a best method of measuring the compressional wave, shear wave and Stoneley
wave in formation at present is the dipole shear wave imaging log and a lot of rock mechanical
properties may be extracted through full wave treatment; owing to the fact that the effect of gas
bearing formation on the compressional wave and shear wave velocities is different through
applying the compressional wave velocity shear wave velocity ratio and Poissons ratio, the oil
and gas bearing can be visually identified and the gas oil interface can be divided. By means
of the expound of the basic principles of the logging methods mentioned above and the fact that
in pr
出处
《天然气工业》
EI
CAS
CSCD
北大核心
1999年第2期54-57,共4页
Natural Gas Industry
关键词
凝析气藏
成像测井
测井
地层压力
气层
Condensate gas, Inaging logging, Well logging, Formation pressure, Compressional
wave velocity, Shear wave velocity, Poissons ratio, Talimu Basin
