摘要
吐哈三大主力油田丘陵、鄯善、温米的孔隙度平均为10%-18%,渗透率平均为10×10^(-3)90×10^(-3)μm^2,地层水矿化度变化范围为5000ppm～30000ppm,在国内许多成熟的水淹层识别测井技术如C/O、人工电位等均由于吐哈苛刻的地质条件无法应用,即使国际驰名的测井公司,如斯仑贝谢也不能有效的解决吐哈油田油层强水淹的难题。而以往的中子寿命测井则通过测量地层水中Cl^-的俘获截面而获得资料,这种方法要求地层水必须要有高矿化度这一条件。硼中子寿命测井方法则采用具有高俘获截面的硼离子(B^-),对地层的孔隙度、渗透率和矿化度的要求不高,特别适合具有低孔、低渗、低矿化度特征的吐哈主力油田。2000年通过20口井的硼中子寿命测井,有效地解决了丘陵、鄯善、温米油田的水淹层识别问题,为油田开发封堵水提供科学依据。
The average porosity of the three main oil field Qiuling, Shanshan and Wenmi in Tuba basin ranges from 10% to 18%, the permeability from 10×10 -3 to 90×10 -3μm^2, and the salinity of formation water from 5000 ppm to 3000 ppm.. Many mature watered-out interval identification techniques such as C/O, induced polarization log is not applicable in Tuha oil field due to its poor geologic condition. Even those famous log companys such as Schlumberger, can not identify the serious watered-out interval in Tuha oil field effectively. Conventional neutron lifetime log can only be used in environment with high formation water salinity, whereas boron neutron lifetime log which does not require strict porosity, permeability and salinity conditions, is especially suitable for the low porosity, low permeability and low salinity Tuba oil field. Boron neutron lifetime log was applied in 20 wells in 2000, which identified the watered-out interval effectively, and provided scientific basis for water shutoff in these oil fields.
出处
《吐哈油气》
2001年第3期39-45,102-103,共9页
Tuha Oil & Gas
关键词
硼中子寿命测井
水淹层
俘获截面
封堵水
Boron neutron lifetime log, waterflooded interval, water shutoff
