CN107448197B - Method for quantitatively identifying spatial development of channeling channel of marine sandstone reservoir - Google Patents
Method for quantitatively identifying spatial development of channeling channel of marine sandstone reservoir Download PDFInfo
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Abstract
一种海相砂岩油藏窜流通道空间发育定量识别的方法，依据油藏描述资料，动态生产数据和测试监测资料，分别从注水井、生产井和注采井井间三个步骤逐次完成海相砂岩油藏窜流通道空间发育定量化识别，本发明提供的识别方法考虑了海相砂岩油藏复杂渗流屏障导致的空间窜流特征，可以判别不同渗流屏障下的窜流通道顺层和跨层连通性，并提高了发育深度识别的精度到小层内部1‑2m，可为后续调剖堵水层段的优选提供依据。
A method for quantitatively identifying the spatial development of channeling channels in marine sandstone oil reservoirs. According to reservoir description data, dynamic production data and test monitoring data, the marine sandstone reservoir is successively completed in three steps: water injection wells, production wells and between injection and production wells. Quantitative identification of the spatial development of channeling channels in facies sandstone reservoirs. The identification method provided by the present invention takes into account the spatial channeling characteristics caused by complex seepage barriers in marine sandstone reservoirs, and can identify the channeling channels under different seepage barriers. The layer connectivity is improved, and the accuracy of development depth identification is improved to 1-2m inside the sublayer, which can provide a basis for the selection of subsequent profile control and water shutoff intervals.
Description
技术领域technical field
本发明属于油藏工程技术领域，具体涉及一种海相砂岩油藏窜流通道空间发育定量识别的方法。The invention belongs to the technical field of oil reservoir engineering, and particularly relates to a method for quantitatively identifying the spatial development of channeling channels in marine sandstone oil reservoirs.
背景技术Background technique
窜流通道的识别方法国外的研究起步较早，但多针对碳酸盐油藏由于成岩作用形成的裂缝和高渗透层而发育的水驱原生高渗通道，国内的研究发展较为迅速且比较成熟，但主要研究对象基本上都是针对东部陆相水驱砂岩油藏次生高渗通道进行的，并没有考虑海相砂岩油藏复杂渗流屏障导致的空间窜流特征，建立适合于海相砂岩油藏的窜流通道识别体系和方法。另外对于海相块状厚层砂岩油藏，识别到小层级别并不能满足后续的调剖堵水层段优选。The research on the identification method of channeling channels started earlier, but most of them focus on the primary high-permeability channels developed by waterflooding due to fractures and high-permeability layers formed by diagenesis in carbonate reservoirs. Domestic research has developed rapidly and maturely. However, the main research objects are basically carried out on the secondary high-permeability channels of the eastern continental water-flooding sandstone reservoirs, without considering the spatial channeling characteristics caused by the complex seepage barriers in the marine sandstone reservoirs. Channeling channel identification system and method. In addition, for marine massive thick sandstone reservoirs, the identification of small layer levels cannot satisfy the subsequent selection of profile control and water shutoff intervals.
发明内容SUMMARY OF THE INVENTION
为了克服上述现有技术的不足，本发明的目的是提供一种海相砂岩油藏窜流通道空间发育定量识别的方法，针对海相砂岩油藏复杂渗流屏障导致的空间窜流识别的难点，我们基于油藏描述资料，动态生产数据和测试监测资料，利用油藏描述和油藏工程手段，分别从注水井、生产井和注采井井间三个步骤逐次完成海相砂岩油藏窜流通道空间发育定量化识别。In order to overcome the above-mentioned deficiencies of the prior art, the purpose of the present invention is to provide a method for quantitatively identifying the spatial development of channeling channels in marine sandstone reservoirs, aiming at the difficulty of identifying the spatial channeling caused by complex seepage barriers in marine sandstone reservoirs, Based on reservoir description data, dynamic production data and test monitoring data, we use reservoir description and reservoir engineering methods to successively complete the channeling of marine sandstone reservoirs in three steps: water injection wells, production wells and between injection and production wells. Quantitative identification of tract spatial development.
为了实现上述目的，本发明采用的技术方案是：In order to achieve the above object, the technical scheme adopted in the present invention is:
一种海相砂岩油藏窜流通道空间发育定量识别的方法，包括以下步骤：A method for quantitatively identifying the spatial development of channeling channels in marine sandstone reservoirs, comprising the following steps:
1）注水井窜流通道发育层位和深度的确定1) Determination of the development horizon and depth of the channeling channel of the water injection well
注水井窜流通道发育层位和深度的识别结合静态地质物性分析和动态开发特征分析，具体使用到的资料或指标包括小层渗透率，地层系数，岩相描述资料，吸水剖面资料，小层分层劈产数据，视吸水指数和注水指示曲线；The identification of the development horizon and depth of the channeling channel of the water injection well is combined with the analysis of static geological properties and the analysis of dynamic development characteristics. The specific data or indicators used include the permeability of the sublayer, the formation coefficient, the lithofacies description data, the water absorption profile data, the sublayer Layered split production data, depending on water absorption index and water injection indicator curve;
2）生产井窜流通道发育层位和深度的确定2) Determination of development horizon and depth of channeling channels in production wells
生产井窜流通道发育层位和深度的识别同样结合静态地质物性分析和动态开发特征分析，具体使用到的资料或指标包括小层渗透率，地层系数，岩相描述资料，小层分层劈产数据，产液指数，含水率曲线，历史措施资料，水淹层解释资料和综合解释图；The identification of the development horizon and depth of the channeling channel of the production well is also combined with the analysis of static geological properties and the analysis of dynamic development characteristics. The specific data or indicators used include permeability of small layers, formation coefficients, lithofacies description data, and sub-layer splitting. Production data, liquid production index, water cut curve, historical measure data, water-flooded layer interpretation data and comprehensive interpretation map;
3）注采井间窜流通道发育层位深度和类型的识别3) Identification of formation depth and type of channeling channel development between injection and production wells
由于一口生产井可能会受到多口注水井的影响，同样一口注水井对应多口生产井，因此上述两个步骤确定的注水井和对应生产井窜流通道可能发育的层位和深度，并不能保证两口井之间一定会发育窜流通道，还需要结合井间示踪剂资料和水驱前缘资料来确定两口井之间连通的程度，另外海相砂岩油藏由于井间渗流屏障发育不连续会导致层间窜流，因此还需要根据井间渗流屏障描述资料来确定不同层之间是否跨层发育窜流通道，采用两大类三小类井间窜流通道发育的类型，分别是窜流通道顺层发育型和窜流通道跨层发育型，其中后者又分为窜流通道本层向上发育型和窜流通道本层向下发育型。Since a production well may be affected by multiple water injection wells, and the same water injection well corresponds to multiple production wells, the formation and depth of the channeling channels of the water injection wells and the corresponding production wells determined in the above two steps cannot be To ensure that there will be a channeling channel between the two wells, it is also necessary to combine the inter-well tracer data and the water flooding front data to determine the degree of connectivity between the two wells. In addition, the marine sandstone reservoirs are not well developed due to the poor development of inter-well seepage barriers. Continuity will lead to interlayer channeling, so it is also necessary to determine whether cross-layer channeling channels are developed between different layers according to the description data of inter-well seepage barriers. The channeling channel is developed along the bedding type and the channeling channel is developed across the layer, of which the latter is further divided into the channeling channel developed upwards in the same layer and the channeling channel developed downwards in the same layer.
所述的注水井窜流通道发育层位和深度的识别包括以下步骤：The identification of the development horizon and depth of the channeling channel of the water injection well includes the following steps:
1）层间物性差异对比1) Comparison of physical properties between layers
以小层深度级别绘制渗透率和地层系数纵向分布图，通过分析纵向上物性非均质程度，从整体上了解目标井是否具有发育窜流通道的地质基础以及可能发育的层位，纵向渗透率或地层系数变化较大或存在局部小层渗透率或地层系数较高的井，则较容易发育窜流通道；The vertical distribution map of permeability and formation coefficient is drawn at the sub-layer depth level. By analyzing the degree of physical heterogeneity in the vertical direction, it is possible to understand whether the target well has the geological basis for developing channeling channels and the layers that may be developed. The vertical permeability Or if the formation coefficient changes greatly, or there are wells with local small layer permeability or high formation coefficient, it is easier to develop channeling channels;
2）纵向沉积岩相差异对比2) Comparison of vertical sedimentary lithofacies differences
以小层内部深度级别绘制沉积岩相纵向分布图，根据小层内部不同深度的岩相类型，进一步确定小层内部可能发育窜流通道的具体深度，岩相属性越好的深度段越容易发育窜流通道；Draw the longitudinal distribution map of sedimentary lithofacies according to the depth level inside the sublayer, and further determine the specific depth of channeling channels that may develop in the sublayer according to the lithofacies types at different depths in the sublayer. The depth section with better lithofacies is more likely to develop channeling channels. flow channel;
3）注水井相对吸水剖面对比3) Comparison of relative water absorption profiles of water injection wells
为满足识别精度的需求，首先需要以小层内部一米一段深度级别重新处理和绘制注水井相对吸水剖面，同时结合注水井段渗透率或地层系数较大的层位深度、小层内部最优岩相所在的层位深度和历史吸水层段以及吸水剖面非均质性变化，综合确定注水井在小层内部的主要吸水层位所在的深度，也是注水井容易发育窜流通道的层位深度；In order to meet the requirements of identification accuracy, it is first necessary to reprocess and draw the relative water absorption profile of the injection well at a depth of one meter and a section inside the small layer. The depth of the layer where the lithofacies is located, the historical water absorption interval and the heterogeneity change of the water absorption profile, comprehensively determine the depth of the main water absorption layer of the water injection well in the small layer, which is also the layer depth where the water injection well is easy to develop channeling channels ;
4）注水井生产动态分析4) Dynamic analysis of water injection well production
首先绘制注水井分层注水量曲线图和累计直方图，从小层吸水量的变化和累计注水量的大小来进一步论证容易发育窜流通道的小层，然后根据吸水指数曲线和注水指示曲线来确定该井在动态上是否表现出发育窜流通道的特征，吸水指数后期升高和注水指示曲线显示后期吸水能力有所增强，则证明该井可能发育窜流通道，如果动态上显示该井可能发育窜流通道，则从注水井角度确定的窜流通道可能发育的层位为步骤3）确定的层位深度。First, draw the water injection volume curve and cumulative histogram of the water injection well, and further demonstrate the small layer that is easy to develop channeling channels from the change of water absorption of the small layer and the size of the cumulative water injection, and then determine according to the water absorption index curve and the water injection indicator curve. Whether the well shows the characteristics of developing channeling channels in the dynamic, the water absorption index increases in the later stage and the water injection indicator curve shows that the water absorption capacity increases in the later stage, it proves that the well may develop channeling channels, if the dynamic shows that the well may develop Channeling channel, the formation of channeling channel determined from the perspective of the water injection well is the layer depth determined in step 3).
所述的生产井窜流通道发育层位和深度的识别包括以下步骤：The identification of the development horizon and depth of the channeling channel of the production well includes the following steps:
1）层间物性差异对比1) Comparison of physical properties between layers
以小层深度级别绘制渗透率和地层系数纵向分布图，通过分析纵向上物性非均质程度，从整体上了解目标井是否具有发育窜流通道的地质基础以及可能发育的层位，纵向渗透率或地层系数变化较大或存在局部小层渗透率或地层系数较高的井，则较容易发育窜流通道；The vertical distribution map of permeability and formation coefficient is drawn at the sub-layer depth level. By analyzing the degree of physical heterogeneity in the vertical direction, it is possible to understand whether the target well has the geological basis for developing channeling channels and the layers that may be developed. The vertical permeability Or if the formation coefficient changes greatly, or there are wells with local small layer permeability or high formation coefficient, it is easier to develop channeling channels;
2）纵向沉积岩相差异对比2) Comparison of vertical sedimentary lithofacies differences
以小层内部深度级别绘制沉积岩相纵向分布图，根据小层内部不同深度的岩相类型，进一步确定小层内部可能发育窜流通道的具体深度，岩相属性越好的深度段越容易发育窜流通道；Draw the longitudinal distribution map of sedimentary lithofacies according to the depth level inside the sublayer, and further determine the specific depth of channeling channels that may develop in the sublayer according to the lithofacies types at different depths in the sublayer. The depth section with better lithofacies is more likely to develop channeling channels. flow channel;
3）生产井生产动态分析3) Production dynamic analysis of production wells
首先绘制生产井分层产液量曲线图和累计直方图，从小层产液量的变化和累计产液量的大小来进一步论证容易发育窜流通道的小层，然后根据产液指数曲线和历史含水率曲线来确定该井在动态上是否表现出发育窜流通道的特征，产液指数后期升高和含水率突然升高，则证明该井可能发育窜流通道，在分析含水率突然升高的时候需要结合历史措施资料，包括补孔封堵和酸化资料，还需要根据纵向水淹层解释资料来排除水淹层导致的含水率突变，根据上述分析最终得到生产井可能发育窜流通道的具体层位和深度；First, draw the layered liquid production curve and cumulative histogram of the production well, and further demonstrate the small layers that are easy to develop channeling channels from the changes of the liquid production in the small layers and the size of the cumulative liquid production. Then, according to the liquid production index curve and historical The water cut curve can be used to determine whether the well shows the characteristics of developing channeling channels. If the liquid production index increases in the later stage and the water cut suddenly increases, it proves that the well may develop channeling channels. It is necessary to combine the historical measures data, including hole filling, plugging and acidification data, and also need to exclude the sudden change of water cut caused by the water-flooded layer according to the longitudinal water-flooded layer interpretation data. specific layers and depths;
4）生产井窜流通道发育深度确定4) Determination of the development depth of channeling channels in production wells
上述三个步骤识别出的窜流通道发育深度存在不够精细的问题，因此这部分再结合生产井综合解释图资料，根据图中的射孔段资料和渗透率峰值资料，最终确定生产井可能发育窜流通道的具体深度。The development depth of the channeling channels identified in the above three steps is not precise enough. Therefore, this part is combined with the comprehensive interpretation map data of production wells, and finally determined that the production wells may develop according to the perforation section data and permeability peak data in the figure. The specific depth of the channeling channel.
本发明的有益效果是：The beneficial effects of the present invention are:
本发明提供的方法可以判别不同渗流屏障下的窜流通道顺层和跨层连通性，并提高了发育深度识别的精度到小层内部1-2m。The method provided by the invention can discriminate the inter-layer and cross-layer connectivity of channeling channels under different seepage barriers, and improve the accuracy of development depth identification to 1-2m inside the sublayer.
附图说明Description of drawings
图1为本发明的方法流程图；Fig. 1 is the method flow chart of the present invention;
图2为本发明实施例中海相砂岩油藏构造井位图及I1和I2井组分布图。FIG. 2 is a structural well location map and a distribution map of I1 and I2 well groups in a marine sandstone reservoir in an embodiment of the present invention.
具体实施方式Detailed ways
下面结合附图和实施例对本发明技术方案进一步叙述，但本发明不局限于以下实施例。The technical solutions of the present invention are further described below with reference to the accompanying drawings and embodiments, but the present invention is not limited to the following embodiments.
塔里木海相砂岩油藏DH在长期注水开发中形成窜流通道，从上到下共发育14个小层，分别是01, 02, 11, 12, 13, 21, 22, 31, 32, 4, 51, 52, 53 和6。利用本发明提出的方法以I1和I2典型井组为例来说明如何进行窜流通道发育区域和射孔深度识别。I1注采井组包括4口生产井P1，P2，P3和P4（由于该井为水平井且生产层位只有一层，故不做窜流通道识别分析），I2注采井组包括4口生产井P5，P6，P7和P8，具体井位分布如图2所示。The Tarim marine sandstone reservoir DH formed a channeling channel in the long-term waterflooding development, and developed 14 sublayers from top to bottom, namely 01, 02, 11, 12, 13, 21, 22, 31, 32, 4, 51, 52, 53 and 6. Using the method proposed in the present invention, the typical well groups I1 and I2 are taken as examples to illustrate how to identify the development area of the channeling channel and the perforation depth. I1 injection-production well group includes 4 production wells P1, P2, P3 and P4 (since the well is a horizontal well and there is only one production layer, so no channel identification analysis is performed), and I2 injection-production well group includes 4 production wells Production wells P5, P6, P7 and P8, the specific well location distribution is shown in Figure 2.
实施例1Example 1
如发明内容方法所述，分别以小层深度级别绘制渗透率和地层系数纵向分布图，沉积岩相纵向分布图，注水井相对吸水剖面，注水井分层注水量曲线图和累计直方图，可得到注水井I1井在21层的5799.65-5800.65m，32层的5825.39-5827.37m和4层的5835.29-5836.28m发育窜流通道。As described in the content and method of the invention, the vertical distribution map of permeability and formation coefficient, the vertical distribution map of sedimentary lithofacies, the relative water absorption profile of water injection wells, the layered water injection volume curve and cumulative histogram of water injection wells are drawn respectively at the depth level of small layers, and the obtained Water injection well I1 develops channeling channels at 5799.65-5800.65m in the 21st layer, 5825.39-5827.37m in the 32nd layer and 5835.29-5836.28m in the 4th layer.
如发明内容方法所述，分别以小层深度级别绘制渗透率和地层系数纵向分布图，沉积岩相纵向分布图，生产井分层产液量曲线图和累计直方图，生产井综合解释图，可得到生产井P1可能发育窜流通道的具体深度为32层的5783.00-5787.25m和4层的5798.15-5799.95m。As described in the content and method of the invention, the vertical distribution map of permeability and formation coefficient, the vertical distribution map of sedimentary lithofacies, the layered liquid production curve and cumulative histogram of production wells, the comprehensive interpretation map of production wells, It is obtained that the specific depths where the production well P1 may develop channeling channels are 5783.00-5787.25m for 32 layers and 5798.15-5799.95m for 4 layers.
如发明内容方法所述，分别以小层深度级别绘制渗透率和地层系数纵向分布图，沉积岩相纵向分布图，生产井分层产液量曲线图和累计直方图，生产井综合解释图，可得到生产井P2可能发育窜流通道的具体深度为32层的5801.32-5803.32m。As described in the content and method of the invention, the vertical distribution map of permeability and formation coefficient, the vertical distribution map of sedimentary lithofacies, the layered liquid production curve and cumulative histogram of production wells, the comprehensive interpretation map of production wells, It is obtained that the specific depth where the channeling channel may develop in the production well P2 is 5801.32-5803.32m in 32 layers.
如发明内容方法所述，分别以小层深度级别绘制渗透率和地层系数纵向分布图，沉积岩相纵向分布图，生产井分层产液量曲线图和累计直方图，生产井综合解释图，可得到生产井P3可能发育窜流通道的具体深度为21层的5749.10-5751.95m和22层的5761.65-5764.30m。As described in the content and method of the invention, the vertical distribution map of permeability and formation coefficient, the vertical distribution map of sedimentary lithofacies, the layered liquid production curve and cumulative histogram of production wells, the comprehensive interpretation map of production wells, It is obtained that the specific depth of channeling channels in production well P3 is 5749.10-5751.95m in 21 layers and 5761.65-5764.30m in 22 layers.
如发明内容方法所述，可得到注水井I1在21、32和4小层发育窜流通道，而生产井P1在32和4小层发育窜流通道，根据井间渗流屏障描述资料，井间22层底部和32层底部都发育完全遮挡渗流屏障，因此两口井之间窜流通道只能是顺层发育型，即注水井的32小层和生产井的32小层，注水井的4小层和生产井的4小层。As described in the content of the invention and the method, it can be obtained that the injection well I1 develops channeling channels in sublayers 21, 32 and 4, while the production well P1 develops channeling channels in sublayers 32 and 4. According to the description data of the interwell seepage barrier, the The bottom of the 22nd layer and the bottom of the 32nd layer are developed to completely block the seepage barrier, so the channeling channel between the two wells can only be developed along the layer, that is, the 32nd layer of the water injection well and the 32nd layer of the production well, and the 4th layer of the water injection well. 4 sub-layers of layers and production wells.
如发明内容方法所述，可得到注水井I1在21、31和4小层发育窜流通道，而生产井P2在32小层发育窜流通道，根据井间渗流屏障描述资料，井间22层底部和4层顶部都发育完全遮挡渗流屏障，因此两口井之间窜流通道只能是顺层发育型，即注水井的32小层和生产井的32小层。As described in the content of the invention and the method, it can be obtained that water injection well I1 develops channeling channels in sublayers 21, 31 and 4, while production well P2 develops channeling channels in sublayer 32. According to the description data of the seepage barrier between wells, there are 22 layers between wells. Both the bottom and the top of the 4th layer are developed to completely block the seepage barrier, so the channeling channel between the two wells can only be developed in layers, that is, the 32nd layer of the injection well and the 32nd layer of the production well.
如发明内容方法所述，可得到注水井I1在21、31和4小层发育窜流通道，而生产井P3在21和22小层发育窜流通道，根据井间渗流屏障描述资料，井间21层底部和31层顶部都发育完全遮挡渗流屏障，因此两口井之间窜流通道是顺层发育型和跨层发育型（本层向下），即注水井的21小层和生产井的21小层，注水井的21小层和生产井的22小层。According to the method of the content of the invention, it can be obtained that the injection well I1 develops channeling channels in sublayers 21, 31 and 4, while the production well P3 develops channeling channels in sublayers 21 and 22. According to the description data of the interwell seepage barrier, the Both the bottom of layer 21 and the top of layer 31 are developed with complete blocking seepage barriers, so the channeling channel between the two wells is of the layered development type and the cross-layer development type (this layer is downward), that is, the 21st layer of the water injection well and the production well. Sublayer 21, sublayer 21 for injection wells and sublayer 22 for production wells.
如发明内容方法所述，可得到注采井组I1窜流通道发育层位深度和类型如表1所示，该井组共发育5组窜流通道，发育类型分别为窜流通道顺层发育型和窜流通道跨层发育型（本层向下），层位深度识别精度达到1-2m。As described in the content and method of the invention, it can be obtained that the depth and type of channeling channels developed in the injection-production well group I1 are shown in Table 1. There are 5 groups of channeling channels developed in this well group, and the development types are that the channeling channels are developed along the bed. type and cross-layer development type of channeling channel (this layer is downward), and the recognition accuracy of horizon depth reaches 1-2m.
实施例2Example 2
如发明内容方法所述，分别以小层深度级别绘制渗透率和地层系数纵向分布图，沉积岩相纵向分布图，注水井相对吸水剖面，注水井分层注水量曲线图和累计直方图，可得到注水井I2井在31层的5856-5857m发育窜流通道。As described in the content and method of the invention, the vertical distribution map of permeability and formation coefficient, the vertical distribution map of sedimentary lithofacies, the relative water absorption profile of water injection wells, the layered water injection volume curve and cumulative histogram of water injection wells are drawn respectively at the depth level of small layers, and the obtained The water injection well I2 develops a channeling channel at 5856-5857m in the 31st layer.
如发明内容方法所述，分别以小层深度级别绘制渗透率和地层系数纵向分布图，沉积岩相纵向分布图，生产井分层产液量曲线图和累计直方图，生产井综合解释图，可得到生产井P5可能发育窜流通道的具体深度为21层的5776.07-5780.31m，22层的5786.42-5792.39m和32层的5803.72-5808.19m。As described in the content and method of the invention, the vertical distribution map of permeability and formation coefficient, the vertical distribution map of sedimentary lithofacies, the layered liquid production curve and cumulative histogram of production wells, the comprehensive interpretation map of production wells, It is obtained that the specific depth of channeling channels in production well P5 is 5776.07-5780.31m for 21 layers, 5786.42-5792.39m for 22 layers and 5803.72-5808.19m for 32 layers.
如发明内容方法所述，分别以小层深度级别绘制渗透率和地层系数纵向分布图，沉积岩相纵向分布图，生产井分层产液量曲线图和累计直方图，生产井综合解释图，可得到生产井P6可能发育窜流通道的具体深度为32层的5812.10-5814.60m。As described in the content and method of the invention, the vertical distribution map of permeability and formation coefficient, the vertical distribution map of sedimentary lithofacies, the layered liquid production curve and cumulative histogram of production wells, the comprehensive interpretation map of production wells, It is obtained that the specific depth where the channeling channel may develop in the production well P6 is 5812.10-5814.60m in the 32nd layer.
如发明内容方法所述，分别以小层深度级别绘制渗透率和地层系数纵向分布图，沉积岩相纵向分布图，生产井分层产液量曲线图和累计直方图，生产井综合解释图，可得到生产井P7可能发育窜流通道的具体深度为21层的5798.48-5802.12m和5805.51-5810.28m。As described in the content and method of the invention, the vertical distribution map of permeability and formation coefficient, the vertical distribution map of sedimentary lithofacies, the layered liquid production curve and cumulative histogram of production wells, the comprehensive interpretation map of production wells, The specific depths where the production well P7 may develop channeling channels are 5798.48-5802.12m and 5805.51-5810.28m in 21 layers.
如发明内容方法所述，分别以小层深度级别绘制渗透率和地层系数纵向分布图，沉积岩相纵向分布图，生产井分层产液量曲线图和累计直方图，生产井综合解释图，可得到生产井P8可能发育窜流通道的具体深度为21层的5756.32-5761.48m和5762.72-5766.08m。As described in the content and method of the invention, the vertical distribution map of permeability and formation coefficient, the vertical distribution map of sedimentary lithofacies, the layered liquid production curve and cumulative histogram of production wells, the comprehensive interpretation map of production wells, The specific depths where the production well P8 may develop channeling channels are 5756.32-5761.48m and 5762.72-5766.08m in 21 layers.
如发明内容方法所述，可得到注水井I2在31小层发育窜流通道，而生产井P5在21，22和32小层发育窜流通道，根据井间渗流屏障描述资料，井间31层顶部发育完全遮挡型隔夹层和井间31层底部发育部分遮挡型隔夹层，所以31层本层向上不能发育窜流通道，因此两口井之间窜流通道只能是跨层（本层向下）发育型，即注水井的31小层和生产井的32小层。As described in the content of the invention and the method, it can be obtained that the injection well I2 develops channeling channels in sublayer 31, while the production well P5 develops channeling channels in sublayers 21, 22 and 32. According to the description data of the interwell seepage barrier, the 31 layer between wells There is a completely shielded interlayer at the top and a partially shielded interlayer at the bottom of the 31st layer between the wells, so the channeling channel cannot develop upward in this layer of the 31st layer, so the channeling channel between the two wells can only be a cross-layer (this layer is downwards). ) development type, that is, sublayer 31 for injection wells and sublayer 32 for production wells.
如发明内容方法所述，可得到注水井I2在31小层发育窜流通道，而生产井P6在32小层发育窜流通道，根据井间渗流屏障描述资料，井间31层底部发育部分遮挡型隔夹层，所以31层可以向下发育窜流通道，因此两口井之间窜流通道只能是跨层（本层向下）发育型，即注水井的31小层和生产井的32小层。As described in the content and method of the invention, it can be obtained that water injection well I2 develops channeling channels in sublayer 31, while production well P6 develops channeling channels in sublayer 32. According to the description data of the seepage barrier between wells, there is a partial block at the bottom of layer 31 between wells. Therefore, the channeling channel between the two wells can only be developed across layers (this layer is downward), that is, layer 31 of the injection well and layer 32 of the production well. Floor.
如发明内容方法所述，可得到注水井I2在31小层发育窜流通道，而生产井P7在21小层发育窜流通道，根据井间渗流屏障描述资料，井间31层顶部发育完全遮挡型隔夹层，所以31层本层向上不能发育窜流通道，因此两口井之间不能发育窜流通道。As described in the content and method of the invention, it can be obtained that water injection well I2 develops channeling channels in sublayer 31, while production well P7 develops channeling channels in sublayer 21. According to the description data of the seepage barrier between wells, the top of layer 31 between wells develops complete shielding Therefore, no channeling channel can be developed upwards from this layer of Layer 31, so no channeling channel can be developed between the two wells.
如发明内容方法所述，可得到注水井I2在31小层发育窜流通道，而生产井P8在21小层发育窜流通道，根据井间渗流屏障描述资料，井间31层顶部发育完全遮挡型隔夹层，所以31层本层向上不能发育窜流通道，因此两口井之间不能发育窜流通道。As described in the content and method of the invention, it can be obtained that water injection well I2 develops channeling channels in sublayer 31, while production well P8 develops channeling channels in sublayer 21. According to the description data of the seepage barrier between wells, the top of layer 31 between wells develops complete shielding Therefore, no channeling channel can be developed upwards from this layer of Layer 31, so no channeling channel can be developed between the two wells.
如发明内容方法所述，可得到注采井组I2窜流通道发育层位深度和类型如表2所示，该井组共发育2组窜流通道，发育类型都为窜流通道跨层发育型（本层向下），层位深度识别精度达到1-2m。As described in the content and method of the invention, the formation depth and type of I2 channeling channels in the injection-production well group can be obtained as shown in Table 2. There are 2 groups of channeling channels developed in this well group, and the development type is that the channeling channels develop across layers Type (this layer is down), the horizon depth recognition accuracy reaches 1-2m.
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