地化录井中一种新的生、排烃量计算方法

A NEW CALCULATION METHOD FOR HYDROCARBON GENERATION AND DISCHARGE AMOUNT IN GEOCHEMICAL LOGGING

肖丽华 孟元林 高大岭 郝翠绢 李宏 侯创业

Xiao Lihua Meng Yuanlin Gao Daling Hao Cuijuan Li Hong Hou Chuangye

大庆石油学院秦皇岛分院, 河北秦皇岛, 066004 2. 辽河油田录井公司, 辽宁盘绵, 124010

Qinhuangdao Branch of Daqing Petroleum College 2. Logging Company of Liaohe Oil Field

本文综合考虑了成岩压实、有机质热浪化和类型的影响,以干酪根中无效欣在生烃过程中其绝对含量保持恒星这一原则,建立起一个新的有机碳恢复模型.在此基础上得出了适用于地化录并应用的生、排烃量计算公式,从而使整个过程比以前的图解法更加准确、高效.本方法已成功地应用于辽河油田海上、陆上和外盆地的地优录并.但本文中仅以铁岭盆地的一口井为例说明了该方法的应用.铁岭盆地昌参2井的地化录井表明,其生径强度为263.794×104t/km2,排烃强度为138.166×104t/km2,资源密度为13.190×104t/km2,达到了我国Ⅰ类含油气盆地的生烃强度标准,昌图凹陷具有较为充足的油气来源,可望形成一些中、小型油气田,下一步勘探的方向主要是寻找圈闭和有利的储层.

By comprehensive consideration over the effect of diagenetic compaction and organic matter thermalevolution and types,a new organic carbon recovery model is established in this paper on the principle thatthe absolute content of unavailable carbon in kerogen remains constant in the pr0cess 0f hydrocarbon generation. On this basis, a calculation formula about hydrocarbon generation and discharge amount fit for geochemical logging is obtained to make the whole calculation process more correct and efficient than for mer illustration method. This new method has been applied successfully in geochemical logging to the offshore, subaerial and peripheral basins of the Liaohe Oil Field. In this paper, only one well in the TielingBasin is taken for example to explain the application of this method.The geochemical log of Dichang 2 well in the Tieling Basin shows that its hydrocarbon generation intensity is 263. 794×104t/km2,its hydrocarbon discharge intensity is 138. 166×104t/km2 and its resource density is 13. 190×104t/km2. All these have come up to the hydrocarbon-generating intensity standard for Ⅰ-typed oil and gas basins of our country.The Changtu Depression has more sufficient source of oil and gas, and is hoped to form some middle and small scale of oil and gas fields. The next exploration program is mainly to find traps and favorable reservoirs.

https://doi.org/10.11781/sysydz199801098