煤田地质与勘探
煤田地質與勘探
매전지질여감탐
COAL GEOLOGY & EXPLORATION
2015年
4期
46-50
,共5页
胡正田%万志杰%张东亮%巩泽文
鬍正田%萬誌傑%張東亮%鞏澤文
호정전%만지걸%장동량%공택문
官寨井田%煤层气直井%压裂工艺
官寨井田%煤層氣直井%壓裂工藝
관채정전%매층기직정%압렬공예
Guanzhai mine%vertical CBM wells%fracturing technology
以贵州官寨井田 GZ-01井为例,针对地质条件复杂、煤层破碎松软、透气性较差以及煤层单层厚度薄且层数多的特点,分别从目标层(段)、射孔、压裂液配方、支撑剂、压裂方式与规模等方面探讨了适合该井田地质与储层条件的煤层气压裂工艺。结果表明,贵州官寨井田煤层膨胀性较低,加入1.0%的 KCl 可抑制煤层膨胀;采用高砂比、大液量、中排量的压裂规模进行分段多层压裂。
以貴州官寨井田 GZ-01井為例,針對地質條件複雜、煤層破碎鬆軟、透氣性較差以及煤層單層厚度薄且層數多的特點,分彆從目標層(段)、射孔、壓裂液配方、支撐劑、壓裂方式與規模等方麵探討瞭適閤該井田地質與儲層條件的煤層氣壓裂工藝。結果錶明,貴州官寨井田煤層膨脹性較低,加入1.0%的 KCl 可抑製煤層膨脹;採用高砂比、大液量、中排量的壓裂規模進行分段多層壓裂。
이귀주관채정전 GZ-01정위례,침대지질조건복잡、매층파쇄송연、투기성교차이급매층단층후도박차층수다적특점,분별종목표층(단)、사공、압렬액배방、지탱제、압렬방식여규모등방면탐토료괄합해정전지질여저층조건적매층기압렬공예。결과표명,귀주관채정전매층팽창성교저,가입1.0%적 KCl 가억제매층팽창;채용고사비、대액량、중배량적압렬규모진행분단다층압렬。
Taking well GZ-01 in Guanzai mine of Guizhou Province as an example, aiming at the characteristics such as broken soft seams, poor permeability, thin and multiple seams, the fracturing technology suitable to the geological and reservoir conditions in the mine was discussed from the view of the target layers(intervals), perfora-tion, formula of the fracturing fluid, proppant agent, fracturing mode and scale. The results showed that the di-latability of coal seams in the mine is low, add expansion can be restrained by adding 1.0% KCl; High sand ratio, large amount of fluid, middle displacement were used to conduct segmental fracturing of multilayers.