油田开发动态色谱指纹监测技术的数学模拟研究

在油气藏的勘探阶段，对油气藏流体的认识只是静态的，宏观的，油气藏一旦投入开发，地下流体就处于运动状态，注水开发油气藏是如此，随着流体不断采出，地下温度压力条件不断变化，由于储集层本身的厚度，孔隙度，渗透度等非均质性的差异，各开采单层的产液贡献也不相同，即井口产出流体的种类，多少以及来源和物理化学性质的变化直接影响着油气的采油率，因此在油井的正常生产过程中就要对油气藏的生产动态进行监测，利用各种井下测试仪器定量解释每个小层的压力，温度，流体密度，体积流量，含水率等各种参数变化，研究油井产液动态，油气运动规律和剩余油分布特征。

Mathematical modeling of dynamic chromatography fingerprint monitoring in the oilfield development

The contribution of individual layers to liquid production is different from each other in the production due to heterogeneities of reservoir rocks and the fluid distribution. Dynamically geochemical monitoring in oilfield development is to estimate the variation of bulk liquid production according to the composition of chromatography fingerprint in the reservoir using chromatography fingerprint correlation analysis developed in 1990's. The aim is to monitor the behavior of fluid in the reservoir, to carry out reservoir management, and make measure to raise oil recovery factor. Physical and mathematical models based on the QR calculation have been made according to the process of commingled production of different pay zones. Chromatography fingerprint parameter database can be established using allocation experimental technology to carry out the research of chemical and mathematical modeling and to determine the characteristic methods of those and the four constrained conditions of model parameters. Modeling results show that the constrained conditions of chromatography fingerprint parameters in calculation are:(1) the parameter reflecting the heterogeneity of each single pay zone remains constant with the variation of contribution; (2) for one fingerprint compound, the content of this compound in the commingled samples are under the control of the relative contribution of single pay zone respectively ; (3)a certain discrete degree must be exist between the array of the parameters of each zone. Therefore mathematical modeling on dynamic monitoring of three pay zone commingled production has been resolved by choosing new parameter. The comprehensive research has been developed on the theory model of dynamically geochemical monitoring technology and dynamic analysis of oilfield exploitation. This is significant in theory and practice.