【摘要】：為摸清河北省煤系天然氣資源潛力,揭示其耦合成藏作用,采用等溫吸附、TOC含量測試、X衍射、巖石熱解、高壓壓汞、液氮吸附、顯微組分鏡鑒、脈沖滲透率等試驗測試,對源-儲地化和物性特征進行研究,結合各賦煤構造區(qū)煤系沉積-構造演化史,進行煤系天然氣資源評價并揭示其成藏作用。結果顯示:河北省煤系天然氣資源豐富,煤層氣資源量39 015×108m3,頁巖氣資源量33 447×108m3,致密砂巖氣資源量24 000×108m3,石炭二疊系占絕對優(yōu)勢;烴源巖有機質以Ⅲ型為主,成熟度Ro介于0.5%~3.0%,以成熟—過成熟階段為主;煤對煤系天然氣藏起決定作用,富有機質泥頁巖起關鍵作用,泥頁巖的厚度優(yōu)勢彌補了有機質"欠缺";煤系儲層連通性較好,屬低孔低滲型,二次生烴作用是煤系天然氣成藏的關鍵;共生調節(jié)機制煤層氣表現為層間調節(jié),頁巖氣為層內調節(jié),砂巖氣為協(xié)調調節(jié);基于共生調節(jié)機制和空間疊置關系,將煤系天然氣藏分為"遠源"致密砂巖氣藏、"自源"頁巖氣/煤層氣藏和"自源+他源"疊合氣藏3類,后者包括3種成藏模式。
[Abstract]:In order to find out the potential of natural gas resources in coal series of Hebei Province and reveal its coupling accumulation, isothermal adsorption, TOC content test, X-ray diffraction, rock pyrolysis, high pressure mercury pressure, liquid nitrogen adsorption, microscopic examination, pulse permeability and so on were used. The characteristics of source-reservoir and physical properties are studied. Combined with the history of sedimentation-structural evolution of coal measures in various coal-bearing structural areas, the natural gas resources of coal measures are evaluated and their reservoir formation is revealed. The results show that there are abundant natural gas resources in coal measures in Hebei Province, with the CBM resources being 39 015 脳 10 8 m 3, shale gas resources 33 447 脳 10 8 m 3, tight sandstone gas resources 24 000 脳 10 8 m 3, Carboniferous Permian dominating. The organic matter of the source rocks is mainly type 鈪，

本文編號：2398509