BZ油田井间动态连通性研究

doi:10.3969/j.issn.1672-9803.2019.02.025

摘要/Abstract

摘要：

BZ油田油藏是渤海典型的中高孔渗稠油油藏,目前处于高含水阶段,开展油藏井间动态连通性的研究对后期剩余油挖潜有重要指导意义。稠油油藏原油粘度较高,存在启动压力梯度,传统的井间动态连通性研究方法不适用于稠油油藏。为此,基于系统分析思想,将注水井、生产井及其井间介质看作一个系统,根据物质平衡原理和稠油油藏的产量描述模型,考虑启动压力梯度影响,利用油田的注采生产资料,建立稠油油藏注采井间动态连通性评价的新模型,并利用最小二乘原理反演得到注采关联系数,进而分析BZ油田的井间动态连通状况。研究结果为渤海BZ油田及其他相似油藏的井间动态连通性分析提供了科学依据。

关键词: 稠油油藏, 动态连通性, 启动压力梯度, 物质平衡, 最小二乘法

Abstract:

The BZ oilfield reservoir is a typical viscous oil reservoir with medium and high porosity and permeability in Bohai Sea and is currently in a high water cut stage. The research on interwell dynamic connectivity in reservoirs has important guiding significance for tapping the potential of remaining oil in the later stage. The viscosity of crude oil in viscous oil reservoirs is high and there is a starting pressure gradient. Traditional research method of interwell dynamic connectivity is not suitable for viscous oil reservoirs. Therefore,water injection wells,production wells and their interwell media are regarded as a system based on the systematic analysis idea. According to the principle of material balance and the production description model of viscous oil reservoir,the influence of starting pressure gradient is considered. A new model for evaluating dynamic connectivity between injection and production wells in viscous oil reservoirs is established by using the injection and production data of the oilfield. And the least square principle inversion is used to obtain the correlation coefficient of injection and production,then the interwell dynamic connectivity in BZ oilfield is analyzed with this coefficient. The research results provide a scientific basis for the analysis of interwell dynamic connectivity in Bohai BZ oilfield and other similar oil reservoirs.

Key words: viscous oil, dynamic connectivity, starting pressure gradient, material balance, least square method

中图分类号:

TE132.1

张伟, 陈存良, 刘斌, 刘喜林, 姚君波. BZ油田井间动态连通性研究[J]. 录井工程, 2019, 30(2): 128-131.

Wei Zhang, Cunliang Chen, Bin Liu, Xilin Liu, Junbo Yao. Study on interwell dynamic connectivity in BZ oilfield[J]. Mud Logging Engineering, 2019, 30(2): 128-131.

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注水井	生产井	注采连通系数
	W 2	0.07
	W 7	0.16
	W 12	0.16
	W 3	0.18
W 8	W 13	0.15
	W 4	0.09
	W 9	0.15
	W 14	0.04
	W 12	0.22
	W 16	0.13
	W 21	0.16
	W 13	0.17
W 17	W 22	0.06
	W 14	0.18
	W 18	0.03
	W 23	0.05
	W 21	0.11
	W 25	0.13
	W 30	0.11
	W 22	0.15
W 26	W 31	0.08
	W 23	0.16
	W 27	0.12
	W 32	0.15