渤海湾盆地垦利16-1区块录井综合解释评价方法

熊 亭，毛 敏，黄小刚，彭文春

中法渤海地质服务有限公司，天津

渤海湾盆地垦利16-1区块录井综合解释评价方法

熊 亭，毛 敏，黄小刚，彭文春

中法渤海地质服务有限公司，天津

渤海湾盆地垦利16-1区块发育两种不同气测特征的油层，一种是气测烃组分齐全，重烃占有一定百分比的正常油层；另一种是气测烃组分不齐全，以C1组分为主，C1所占百分比高，表现为气层或水层特征的生物降解油层；针对研究区油层原油性质复杂多变的特点，分别建立有针对性的解释模版。在分析该区不同类型油层气测、地化岩石热解气相色谱的基础上，建立以C1、iC4、nC4、iC5、nC5轻、重烃组分异常倍数评价参数为主和以地化岩石热解气相色谱分析为辅的正常油层解释标准和建立以全烃、C1异常倍数、地化岩石热解气相色谱为评价参数的生物降解油层解释标准。现场实际应用表明，针对不同气测组分特征优选解释评价标准，无论是正常油层还是生物降解油层均能较好地识别。

垦利16-1区块，气测解释，异常倍数，热解色谱，评价方法

AbstractThere were two types of oil reservoirs with different gas logging characteristics in Block Kenli 16-1 of the Bohai Bay Basin: one was the normal reservoir with complete gas logging hydrocarbon composition and with a certain percentage of heavy hydrocarbons; the other was the biodegradable reservoir with characteristics similar to gas layer or water layer, without complete hydrocarbon components in gas logging, of which the percentage of C1was high. Interpretation charts were established in consideration of the complex and changeable characteristics of oil layer in the study area. Based on the analysis of gas logging, geochemical rock pyrolysis, and gas chromatograph features of different types of reservoirs in the area, the interpretation criteria for normal reservoirs, with anomalous multiple of light and heavy hydrocarbon components of C1, iC4, nC4, iC5, nC5as the main evaluation parameters, and gas chromatography of geochemical rock pyrolysis as assistant parameter, and the interpretation criterion for biodegradable reservoirs with φ(TG), C1anomalous multiple and gas chromatography of geochemical rock pyrolysis as evaluation parameters, were set up. The application shows that with interpretation evaluation criteria are chosen for different gas logging components for accurately identifying the normal reservoirs and biodegradable reservoirs.

KeywordsBlock Kenli 16-1, Gas Logging Interpretation, Anomalous Multiple, Pyrolysis Gas Chromatography,Evaluation Method

1. 引言

垦利16-1构造位于渤海海域莱州湾凹陷南部斜坡带，整体受反向控洼断裂和走滑断裂共同控制，发育断块型圈闭和断鼻型圈闭，其主要含油层段为古近系沙三段和新近系明化镇组下段、馆陶组，油藏具有埋藏浅、储量大、丰度高、原油物性多样、测试产能高等特征[1][2]。从垦利16-1区块实钻情况显示，气测特征主要表现为浅层新近系明化镇组、馆陶组气测组分以C1为主，仅存少量C2、C3，无C4、C5等重组分；……